Year Number of 1800 20640 1801 20640 1802 20640 1803 20640 1804 20640 1805 20640 1806 20640 1807 20640 1808 20640 1809 20640 1810 20640 1811 20650 1812 20660 1813 20680 1814 20710 1815 20740 1816 20780 1817 20830 1818 20880 1819 20940 1820 21010 1821 21090 1822 21170 1823 21260 1824 21360 1825 21460 1826 21570 1827 21690 1828 21820 1829 21950 1830 22090 1831 22240 1832 22390 1833 22540 1834 22690 1835 22840 1836 23000 1837 23150 1838 23310 1839 23470 1840 23620 1841 23780 1842 23940 1843 24100 1844 24270 1845 24430 1846 24600 1847 24760 1848 24930 1849 25100 1850 25260 1851 25440 1852 25620 1853 25800 1854 25980 1855 26170 1856 26350 1857 26540 1858 26720 1859 26910 1860 27100 1861 27290 1862 27480 1863 27680 1864 27870 1865 28070 1866 28270 1867 28470 1868 28670 1869 28870 1870 29070 1871 29280 1872 29480 1873 29680 1874 29890 1875 30100 1876 30320 1877 30530 1878 30740 1879 30960 1880 31180 1881 31390 1882 31610 1883 31840 1884 32060 1885 32280 1886 32510 1887 32740 1888 32960 1889 33200 1890 33430 1891 33670 1892 33900 1893 34140 1894 34380 1895 34620 1896 34860 1897 35100 1898 35330 1899 35560 1900 35780 1901 36000 1902 36220 1903 36430 1904 36640 1905 36840 1906 37040 1907 37230 1908 37410 1909 37600 1910 37780 1911 37960 1912 38140 1913 38310 1914 38490 1915 38670 1916 38850 1917 39030 1918 39200 1919 39360 1920 39540 1921 39700 1922 39880 1923 40400 1924 40820 1925 41360 1926 41980 1927 42740 1928 42740 1929 42880 1930 43230 1931 43700 1932 44030 1933 44480 1934 44780 1935 45200 1936 45480 1937 45880 1938 46140 1939 46370 1940 46600 1941 46240 1942 45870 1943 45500 1944 43220 1945 43110 1946 43030 1947 42920 1948 42850 1949 42740 1950 37360 1951 38450 1952 39550 1953 40440 1954 41140 1955 41830 1956 42820 1957 43380 1958 43750 1959 44250 1960 45190 1961 46320 1962 47620 1963 49000 1964 50440 1965 51860 1966 53220 1967 54320 1968 55200 1969 56080 1970 56950 1971 57930 1972 58420 1973 58450 1974 58040 1975 57300 1976 56730 1977 55580 1978 54260 1979 53060 1980 52230 1981 51640 1982 50940 1983 50150 1984 49200 1985 48160 1986 46860 1987 45590 1988 44540 1989 43900 1990 43760 1991 44290 1992 45170 1993 46300 1994 47550 1995 48880 1996 50230 1997 51140 1998 51580 1999 51420 2000 50600 2001 49200 2002 47300 2003 45150 2004 42850 2005 40540 2006 38360 2007 36200 2008 34190 2009 32430 2010 30940 2011 29730 2012 28890 2013 28310 2014 27780 2015 27060