Global Annual Solar Irradiance Lean Year Solar Irradiance (W/m^2) Year Solar 1500 1363.6053 1501 1363.5981 1502 1363.5901 1503 1363.5813 1504 1363.5714 1505 1363.5605 1506 1363.5490 1507 1363.5371 1508 1363.5258 1509 1363.5151 1510 1363.5059 1511 1363.4978 1512 1363.4912 1513 1363.4861 1514 1363.4823 1515 1363.4796 1516 1363.4778 1517 1363.4762 1518 1363.4742 1519 1363.4719 1520 1363.4696 1521 1363.4675 1522 1363.4662 1523 1363.4656 1524 1363.4663 1525 1363.4686 1526 1363.4730 1527 1363.4799 1528 1363.4890 1529 1363.4990 1530 1363.5090 1531 1363.5183 1532 1363.5266 1533 1363.5339 1534 1363.5408 1535 1363.5468 1536 1363.5522 1537 1363.5574 1538 1363.5620 1539 1363.5664 1540 1363.5706 1541 1363.5745 1542 1363.5781 1543 1363.5818 1544 1363.5857 1545 1363.5896 1546 1363.5940 1547 1363.5989 1548 1363.6042 1549 1363.6100 1550 1363.6162 1551 1363.6229 1552 1363.6299 1553 1363.6372 1554 1363.6445 1555 1363.6521 1556 1363.6597 1557 1363.6672 1558 1363.6748 1559 1363.6826 1560 1363.6906 1561 1363.6987 1562 1363.7078 1563 1363.7170 1564 1363.7273 1565 1363.7383 1566 1363.7502 1567 1363.7633 1568 1363.7775 1569 1363.7928 1570 1363.8091 1571 1363.8259 1572 1363.8430 1573 1363.8604 1574 1363.8774 1575 1363.8943 1576 1363.9102 1577 1363.9252 1578 1363.9392 1579 1363.9523 1580 1363.9651 1581 1363.9773 1582 1363.9896 1583 1364.0023 1584 1364.0154 1585 1364.0293 1586 1364.0444 1587 1364.0608 1588 1364.0789 1589 1364.0989 1590 1364.1207 1591 1364.1445 1592 1364.1704 1593 1364.1980 1594 1364.2260 1595 1364.2527 1596 1364.2769 1597 1364.2979 1598 1364.3164 1599 1364.3329 1600 1364.3474 1601 1364.3602 1602 1364.3715 1603 1364.3813 1604 1364.3900 1605 1364.3967 1606 1364.4009 1607 1364.4019 1608 1364.3987 1609 1364.3915 1610 1364.7421 1611 1364.7155 1612 1365.0865 1613 1365.1835 1614 1365.2445 1615 1364.9628 1616 1364.5529 1617 1364.4218 1618 1364.4012 1619 1364.4769 1620 1364.4630 1621 1364.4489 1622 1364.4347 1623 1364.4208 1624 1364.3710 1625 1364.5624 1626 1364.4474 1627 1364.3514 1628 1364.2635 1629 1364.1288 1630 1363.9279 1631 1363.8778 1632 1363.8378 1633 1363.9301 1634 1363.8478 1635 1363.8414 1636 1363.8002 1637 1363.7877 1638 1364.2245 1639 1364.2670 1640 1363.8353 1641 1363.7030 1642 1363.9933 1643 1363.7462 1644 1363.6549 1645 1363.5702 1646 1363.5685 1647 1363.5663 1648 1363.5590 1649 1363.5502 1650 1363.5463 1651 1363.5441 1652 1363.5702 1653 1363.5482 1654 1363.5219 1655 1363.4899 1656 1363.4838 1657 1363.4725 1658 1363.4569 1659 1363.4491 1660 1363.4613 1661 1363.4545 1662 1363.4493 1663 1363.4496 1664 1363.4498 1665 1363.4501 1666 1363.4501 1667 1363.4491 1668 1363.4486 1669 1363.4484 1670 1363.4481 1671 1363.4537 1672 1363.4506 1673 1363.4481 1674 1363.4496 1675 1363.4471 1676 1363.4579 1677 1363.4476 1678 1363.4469 1679 1363.4457 1680 1363.4510 1681 1363.4457 1682 1363.4457 1683 1363.4457 1684 1363.4550 1685 1363.4462 1686 1363.4503 1687 1363.4476 1688 1363.4523 1689 1363.4535 1690 1363.4559 1691 1363.4613 1692 1363.4667 1693 1363.4686 1694 1363.4696 1695 1363.4698 1696 1363.4689 1697 1363.4691 1698 1363.4696 1699 1363.4711 1700 1363.4755 1701 1363.4808 1702 1363.4901 1703 1363.5165 1704 1363.5458 1705 1363.5770 1706 1363.5780 1707 1363.5995 1708 1363.5931 1709 1363.5992 1710 1363.6288 1711 1363.6747 1712 1363.6967 1713 1363.7147 1714 1363.7623 1715 1363.8119 1716 1363.8566 1717 1363.9203 1718 1363.8627 1719 1364.0321 1720 1364.0179 1721 1364.0631 1722 1364.0104 1723 1363.9965 1724 1364.0978 1725 1364.1105 1726 1364.2997 1727 1364.3134 1728 1364.4994 1729 1364.2343 1730 1364.5326 1731 1364.0685 1732 1364.2030 1733 1364.1317 1734 1364.1693 1735 1364.3063 1736 1364.5140 1737 1364.3622 1738 1364.3246 1739 1364.5548 1740 1364.2631 1741 1364.5731 1742 1364.2960 1743 1364.2396 1744 1364.1884 1745 1364.1981 1746 1364.2196 1747 1364.2499 1748 1364.6732 1749 1364.7064 1750 1364.6693 1751 1364.4955 1752 1364.4801 1753 1364.5084 1754 1364.4701 1755 1364.4984 1756 1364.5533 1757 1364.6803 1758 1364.8011 1759 1364.8700 1760 1364.8531 1761 1365.0297 1762 1364.9359 1763 1364.9012 1764 1364.8822 1765 1364.7396 1766 1364.7145 1767 1364.9091 1768 1365.1420 1769 1365.3148 1770 1365.3405 1771 1365.2882 1772 1365.2684 1773 1365.0929 1774 1365.0756 1775 1364.9496 1776 1364.9916 1777 1365.1354 1778 1365.3524 1779 1365.4012 1780 1365.2269 1781 1365.3373 1782 1365.0741 1783 1364.9510 1784 1364.7704 1785 1364.7797 1786 1365.0470 1787 1365.1732 1788 1365.1010 1789 1365.0770 1790 1364.9847 1791 1364.8402 1792 1364.8114 1793 1364.7538 1794 1364.6102 1795 1364.4496 1796 1364.3781 1797 1364.2948 1798 1364.2587 1799 1364.2650 1800 1364.3134 1801 1364.5673 1802 1364.4139 1803 1364.2408 1804 1364.1976 1805 1364.1615 1806 1364.0321 1807 1363.9386 1808 1363.8734 1809 1363.8148 1810 1363.8053 1811 1363.8468 1812 1363.9281 1813 1364.0116 1814 1364.0746 1815 1364.1586 1816 1364.2504 1817 1364.2045 1818 1364.1451 1819 1364.1361 1820 1364.0892 1821 1364.1293 1822 1364.2406 1823 1364.2928 1824 1364.3710 1825 1364.4674 1826 1364.5824 1827 1364.6971 1828 1364.7836 1829 1364.8085 1830 1364.8641 1831 1364.7252 1832 1364.6576 1833 1364.6088 1834 1364.6774 1835 1364.9572 1836 1365.3563 1837 1365.4542 1838 1365.2675 1839 1365.1940 1840 1365.0778 1841 1364.9242 1842 1364.8676 1843 1364.8070 1844 1364.8522 1845 1364.9862 1846 1365.0868 1847 1365.1942 1848 1365.3993 1849 1365.4052 1850 1365.2069 1851 1365.1669 1852 1365.0282 1853 1364.8888 1854 1364.7762 1855 1364.7255 1856 1364.7606 1857 1364.8961 1858 1365.1022 1859 1365.3221 1860 1365.3798 1861 1365.2548 1862 1365.0785 1863 1364.9498 1864 1364.8402 1865 1364.7289 1866 1364.6610 1867 1364.6090 1868 1364.7728 1869 1365.0194 1870 1365.2655 1871 1365.2177 1872 1365.1730 1873 1364.9630 1874 1364.8021 1875 1364.6190 1876 1364.5531 1877 1364.5660 1878 1364.5685 1879 1364.6190 1880 1364.7782 1881 1364.9286 1882 1364.9637 1883 1365.0101 1884 1364.9154 1885 1364.7598 1886 1364.5417 1887 1364.4534 1888 1364.3982 1889 1364.3771 1890 1364.4343 1891 1364.7068 1892 1364.8284 1893 1364.9929 1894 1365.1100 1895 1365.0010 1896 1364.8105 1897 1364.6373 1898 1364.5856 1899 1364.5201 1900 1364.4935 1901 1364.4550 1902 1364.5204 1903 1364.7725 1904 1365.0706 1905 1364.8956 1906 1365.0936 1907 1364.9462 1908 1364.9689 1909 1364.8232 1910 1364.6868 1911 1364.6218 1912 1364.6084 1913 1364.6606 1914 1364.7516 1915 1365.0594 1916 1365.2737 1917 1365.4111 1918 1365.3765 1919 1365.1475 1920 1365.0043 1921 1364.9368 1922 1364.8643 1923 1364.9331 1924 1364.9849 1925 1365.1954 1926 1365.3077 1927 1365.5018 1928 1365.3846 1929 1365.3583 1930 1365.3765 1931 1365.3037 1932 1365.2345 1933 1365.1362 1934 1365.2623 1935 1365.4735 1936 1365.8519 1937 1365.7734 1938 1365.7096 1939 1365.7058 1940 1365.6858 1941 1365.6743 1942 1365.6448 1943 1365.5505 1944 1365.6161 1945 1365.8856 1946 1365.9655 1947 1366.1919 1948 1366.3350 1949 1366.2435 1950 1366.0225 1951 1365.7949 1952 1365.7917 1953 1365.6499 1954 1365.6777 1955 1365.7910 1956 1366.2810 1957 1366.6420 1958 1366.6198 1959 1366.3829 1960 1366.2941 1961 1365.9280 1962 1365.7251 1963 1365.6726 1964 1365.6913 1965 1365.7522 1966 1365.9689 1967 1366.1837 1968 1366.2572 1969 1366.3534 1970 1366.3418 1971 1366.0293 1972 1366.0608 1973 1365.7830 1974 1365.7035 1975 1365.5284 1976 1365.6698 1977 1365.8816 1978 1366.3074 1979 1366.6498 1980 1366.6693 1981 1366.7026 1982 1366.2853 1983 1366.2240 1984 1365.8596 1985 1365.7024 1986 1365.6989 1987 1365.8459 1988 1366.1172 1989 1366.6605 1990 1366.5685 1991 1366.4420 1992 1366.3640 1993 1366.0822 1994 1365.8519 1995 1365.7672 1996 1365.6820 1997 1365.7797 1998 1366.1332