Year Number of 1800 626600 1801 626600 1802 626600 1803 626600 1804 626600 1805 626600 1806 626600 1807 626600 1808 626600 1809 626600 1810 626600 1811 626900 1812 627500 1813 628300 1814 629400 1815 630800 1816 632500 1817 634500 1818 636800 1819 639300 1820 642200 1821 645400 1822 648900 1823 652700 1824 656800 1825 661200 1826 665900 1827 670900 1828 676300 1829 682000 1830 688000 1831 694400 1832 700800 1833 707300 1834 713800 1835 720400 1836 727000 1837 733800 1838 740500 1839 747400 1840 754300 1841 761200 1842 768300 1843 808600 1844 817700 1845 826900 1846 836200 1847 845600 1848 855100 1849 862600 1850 870300 1851 877900 1852 885700 1853 893500 1854 899700 1855 906000 1856 912300 1857 918600 1858 919600 1859 920600 1860 921500 1861 922500 1862 927400 1863 932300 1864 937200 1865 942200 1866 947200 1867 952200 1868 1100000 1869 1075000 1870 961100 1871 1116000 1872 1181000 1873 1116000 1874 1116000 1875 1141000 1876 1182000 1877 1093000 1878 1222000 1879 1095000 1880 1224000 1881 1066000 1882 1355000 1883 1264000 1884 1132000 1885 1199000 1886 1068000 1887 1136000 1888 1177000 1889 1277000 1890 1352000 1891 1403000 1892 1418000 1893 1277000 1894 1357000 1895 1473000 1896 1477000 1897 1398000 1898 1474000 1899 1293000 1900 1385000 1901 1497000 1902 1447000 1903 1413000 1904 1324000 1905 1451000 1906 1399000 1907 1274000 1908 1319000 1909 1344000 1910 1504000 1911 1317000 1912 1227000 1913 1260000 1914 1136000 1915 1141000 1916 1104000 1917 1067000 1918 1032000 1919 997400 1920 964300 1921 932200 1922 901200 1923 871200 1924 842200 1925 840900 1926 806600 1927 791100 1928 789400 1929 725900 1930 690500 1931 656600 1932 624200 1933 593300 1934 563900 1935 535800 1936 509000 1937 483500 1938 459200 1939 436000 1940 413900 1941 392900 1942 372800 1943 353700 1944 335500 1945 318100 1946 301600 1947 285900 1948 270900 1949 256600 1950 243100 1951 237700 1952 235200 1953 231300 1954 226000 1955 219500 1956 212000 1957 203500 1958 194100 1959 183800 1960 158800 1961 136100 1962 125900 1963 113400 1964 97340 1965 86310 1966 78590 1967 74060 1968 72220 1969 69000 1970 80110 1971 79150 1972 80710 1973 83380 1974 84910 1975 85050 1976 83300 1977 79730 1978 75490 1979 71810 1980 69780 1981 69670 1982 70740 1983 72490 1984 73930 1985 74070 1986 72820 1987 70510 1988 67430 1989 63340 1990 58900 1991 53680 1992 47560 1993 40900 1994 35040 1995 31200 1996 29080 1997 29640 1998 31470 1999 33120 2000 33640 2001 33120 2002 31640 2003 29530 2004 27450 2005 25570 2006 23890 2007 22340 2008 21140 2009 20220 2010 19610 2011 19310 2012 19140 2013 19260 2014 18920 2015 18540