Year Measure 1800 1722 1801 1722 1802 1722 1803 1722 1804 1722 1805 1722 1806 1722 1807 1722 1808 1722 1809 1722 1810 1722 1811 1722 1812 1722 1813 1722 1814 1722 1815 1722 1816 1722 1817 1722 1818 1722 1819 1722 1820 1722 1821 1734 1822 1745 1823 1757 1824 1768 1825 1780 1826 1792 1827 1804 1828 1816 1829 1828 1830 1840 1831 1852 1832 1864 1833 1876 1834 1889 1835 1901 1836 1914 1837 1926 1838 1939 1839 1952 1840 1965 1841 1978 1842 1991 1843 2004 1844 2017 1845 2031 1846 2044 1847 2058 1848 2071 1849 2085 1850 2099 1851 2113 1852 2127 1853 2141 1854 2155 1855 2169 1856 2183 1857 2198 1858 2212 1859 2227 1860 2242 1861 2256 1862 2271 1863 2286 1864 2301 1865 2317 1866 2332 1867 2347 1868 2363 1869 2378 1870 2394 1871 2410 1872 2426 1873 2442 1874 2458 1875 2474 1876 2491 1877 2507 1878 2524 1879 2540 1880 2557 1881 2574 1882 2591 1883 2608 1884 2625 1885 2643 1886 2660 1887 2678 1888 2696 1889 2713 1890 2731 1891 2749 1892 2767 1893 2786 1894 2804 1895 2823 1896 2841 1897 2860 1898 2879 1899 2898 1900 2917 1901 2936 1902 2956 1903 2975 1904 2995 1905 3015 1906 3035 1907 3055 1908 3075 1909 3095 1910 3116 1911 3136 1912 3157 1913 3178 1914 3225 1915 3273 1916 3322 1917 3372 1918 3422 1919 3473 1920 3524 1921 3577 1922 3630 1923 3684 1924 3739 1925 3795 1926 3851 1927 3909 1928 3967 1929 4026 1930 4086 1931 4147 1932 4209 1933 4271 1934 4335 1935 4399 1936 4465 1937 4531 1938 4599 1939 4667 1940 4737 1941 4807 1942 4879 1943 4952 1944 5025 1945 5100 1946 5176 1947 5253 1948 5332 1949 5411 1950 5492 1951 5613 1952 5737 1953 5864 1954 5994 1955 6126 1956 6262 1957 6400 1958 6542 1959 6687 1960 6835 1961 6986 1962 7140 1963 7298 1964 7460 1965 7625 1966 7793 1967 7966 1968 8142 1969 8322 1970 8506 1971 9007 1972 9442 1973 9878 1974 10220 1975 9287 1976 10210 1977 11360 1978 12060 1979 11370 1980 10370 1981 11010 1982 10400 1983 9817 1984 9466 1985 10620 1986 10310 1987 9448 1988 10170 1989 10550 1990 10060 1991 10230 1992 10250 1993 9648 1994 9264 1995 9450 1996 9470 1997 9588 1998 9783 1999 9452 2000 9739 2001 10230 2002 10410 2003 11060 2004 11800 2005 12410 2006 12980 2007 13480 2008 13850 2009 14080 2010 14460 2011 14940 2012 15610 2013 16170 2014 16650 2015 17160 2016 17760 2017 18420 2018 19130 2019 19790