Year Measure 1800 1341 1801 1349 1802 1358 1803 1366 1804 1375 1805 1383 1806 1392 1807 1400 1808 1409 1809 1418 1810 1427 1811 1435 1812 1444 1813 1453 1814 1462 1815 1471 1816 1481 1817 1490 1818 1499 1819 1508 1820 1518 1821 1533 1822 1549 1823 1564 1824 1580 1825 1596 1826 1612 1827 1628 1828 1645 1829 1661 1830 1678 1831 1704 1832 1729 1833 1756 1834 1782 1835 1809 1836 1836 1837 1864 1838 1892 1839 1921 1840 1950 1841 1977 1842 2003 1843 2031 1844 2058 1845 2086 1846 2114 1847 2143 1848 2172 1849 2201 1850 2231 1851 2251 1852 2270 1853 2290 1854 2310 1855 2331 1856 2351 1857 2372 1858 2392 1859 2413 1860 2434 1861 2472 1862 2511 1863 2551 1864 2591 1865 2631 1866 2672 1867 2714 1868 2757 1869 2800 1870 2844 1871 2944 1872 2862 1873 3091 1874 3111 1875 2994 1876 2754 1877 2899 1878 2748 1879 2962 1880 3047 1881 3423 1882 3539 1883 3508 1884 3744 1885 3479 1886 3483 1887 3558 1888 3774 1889 3758 1890 3991 1891 4042 1892 3979 1893 3916 1894 4062 1895 3979 1896 3841 1897 4215 1898 4336 1899 4692 1900 4886 1901 5197 1902 5590 1903 5594 1904 5504 1905 5977 1906 6455 1907 6503 1908 5995 1909 6460 1910 6823 1911 7069 1912 7346 1913 7463 1914 6755 1915 7104 1916 7797 1917 8056 1918 7452 1919 6745 1920 6480 1921 5634 1922 6366 1923 6672 1924 6674 1925 7284 1926 7547 1927 8134 1928 8679 1929 8501 1930 8073 1931 6719 1932 6161 1933 5656 1934 6194 1935 6630 1936 6921 1937 7507 1938 7629 1939 8002 1940 9009 1941 10150 1942 11800 1943 12190 1944 12490 1945 11970 1946 11630 1947 11900 1948 11860 1949 11850 1950 12240 1951 12640 1952 13150 1953 13400 1954 12920 1955 13760 1956 14520 1957 14440 1958 14320 1959 14560 1960 14690 1961 14820 1962 15570 1963 16050 1964 16780 1965 17580 1966 18370 1967 18590 1968 19260 1969 19990 1970 20220 1971 21080 1972 21940 1973 23220 1974 23840 1975 24030 1976 25010 1977 25550 1978 26310 1979 27140 1980 27150 1981 27640 1982 26480 1983 26980 1984 28250 1985 29510 1986 29980 1987 30790 1988 31870 1989 32070 1990 31670 1991 30640 1992 30460 1993 30750 1994 31850 1995 32340 1996 32470 1997 33480 1998 34500 1999 36030 2000 37520 2001 37670 2002 38540 2003 38900 2004 39720 2005 40570 2006 41220 2007 41630 2008 41610 2009 39950 2010 40730 2011 41330 2012 41560 2013 41900 2014 42400 2015 42960 2016 43540 2017 44090 2018 44590 2019 45070