Year Number of 1800 18620 1801 18580 1802 18550 1803 18510 1804 18470 1805 18430 1806 18400 1807 18360 1808 18320 1809 18280 1810 18250 1811 18220 1812 18200 1813 18180 1814 18180 1815 18180 1816 18190 1817 18210 1818 18240 1819 18280 1820 18320 1821 18370 1822 18430 1823 18500 1824 18580 1825 18670 1826 18760 1827 18860 1828 18980 1829 19100 1830 19220 1831 19360 1832 19500 1833 19640 1834 19780 1835 19920 1836 20060 1837 20210 1838 20350 1839 20500 1840 20640 1841 20790 1842 20940 1843 21090 1844 21240 1845 21390 1846 21540 1847 21700 1848 21850 1849 22010 1850 22160 1851 22320 1852 22480 1853 22640 1854 22800 1855 22960 1856 23120 1857 23280 1858 23450 1859 23620 1860 23780 1861 23950 1862 24120 1863 24290 1864 24460 1865 24640 1866 24810 1867 24980 1868 25160 1869 25340 1870 25520 1871 25700 1872 25880 1873 26060 1874 26240 1875 26420 1876 26610 1877 26790 1878 26980 1879 27170 1880 27370 1881 27550 1882 27750 1883 27940 1884 28140 1885 28340 1886 28540 1887 28730 1888 28940 1889 29140 1890 29340 1891 29550 1892 29760 1893 29970 1894 30180 1895 30400 1896 30510 1897 30620 1898 30720 1899 30830 1900 30940 1901 30810 1902 30680 1903 30550 1904 30420 1905 30290 1906 30160 1907 30030 1908 29900 1909 29770 1910 29650 1911 29520 1912 29390 1913 29260 1914 29130 1915 29010 1916 28880 1917 28750 1918 28630 1919 28500 1920 28380 1921 28260 1922 28130 1923 28010 1924 27880 1925 27760 1926 27530 1927 27300 1928 27040 1929 26810 1930 26630 1931 26070 1932 25530 1933 24990 1934 24460 1935 23950 1936 23450 1937 22950 1938 22470 1939 22000 1940 21530 1941 21080 1942 20630 1943 20200 1944 19770 1945 19360 1946 18950 1947 18550 1948 18160 1949 17780 1950 17410 1951 17400 1952 17370 1953 17460 1954 17570 1955 17700 1956 17840 1957 17970 1958 18050 1959 18070 1960 17990 1961 17790 1962 17310 1963 16760 1964 16070 1965 15260 1966 14380 1967 13480 1968 12650 1969 11890 1970 11300 1971 10810 1972 10460 1973 10820 1974 11250 1975 11760 1976 12340 1977 12990 1978 13720 1979 14540 1980 18760 1981 19140 1982 18210 1983 18270 1984 18370 1985 18510 1986 18750 1987 19010 1988 19250 1989 19420 1990 19510 1991 19440 1992 19180 1993 18680 1994 17920 1995 16860 1996 15530 1997 13960 1998 12340 1999 10880 2000 9630 2001 8618 2002 7883 2003 7379 2004 7006 2005 6737 2006 6519 2007 6329 2008 6211 2009 6200 2010 6327 2011 6611 2012 6982 2013 7296 2014 7403 2015 7206