Year Number of
1800 37980
1801 37980
1802 37980
1803 37980
1804 37980
1805 37980
1806 37980
1807 37980
1808 37980
1809 37980
1810 37980
1811 37980
1812 37990
1813 38000
1814 38020
1815 38040
1816 38060
1817 38090
1818 38120
1819 38160
1820 38200
1821 38250
1822 38300
1823 38350
1824 38410
1825 38470
1826 38540
1827 38610
1828 38680
1829 38760
1830 38850
1831 38940
1832 39020
1833 39110
1834 39200
1835 39290
1836 39380
1837 39470
1838 39560
1839 39650
1840 39740
1841 39830
1842 39920
1843 40010
1844 40100
1845 40190
1846 40280
1847 40370
1848 40460
1849 40550
1850 40640
1851 40740
1852 40850
1853 40950
1854 41050
1855 41150
1856 41250
1857 41360
1858 41460
1859 41560
1860 41660
1861 41780
1862 41900
1863 42020
1864 42160
1865 42310
1866 42460
1867 42630
1868 42800
1869 42980
1870 43180
1871 43380
1872 43590
1873 43760
1874 44000
1875 44240
1876 44490
1877 44730
1878 45020
1879 45310
1880 45610
1881 45900
1882 46200
1883 46500
1884 46800
1885 47110
1886 47420
1887 47730
1888 48040
1889 48360
1890 48670
1891 48990
1892 49310
1893 49640
1894 49960
1895 50280
1896 50600
1897 50920
1898 51240
1899 51540
1900 51840
1901 52140
1902 52420
1903 52700
1904 52980
1905 53240
1906 53510
1907 53750
1908 54000
1909 54240
1910 54470
1911 54700
1912 54930
1913 55210
1914 55560
1915 55960
1916 56360
1917 56760
1918 57160
1919 57560
1920 57960
1921 58360
1922 58770
1923 59180
1924 59590
1925 60000
1926 60420
1927 60840
1928 61260
1929 61680
1930 62390
1931 63100
1932 63810
1933 64510
1934 65200
1935 65900
1936 66590
1937 67280
1938 67960
1939 68640
1940 69320
1941 69990
1942 70660
1943 71320
1944 71980
1945 72640
1946 70970
1947 69550
1948 67880
1949 66450
1950 64790
1951 64940
1952 65200
1953 65640
1954 66040
1955 66610
1956 67130
1957 67580
1958 67950
1959 68310
1960 68640
1961 68900
1962 68830
1963 68640
1964 68330
1965 67890
1966 68220
1967 68480
1968 68680
1969 68780
1970 68670
1971 73210
1972 77620
1973 81910
1974 86210
1975 98390
1976 83810
1977 67160
1978 51120
1979 39530
1980 34240
1981 32740
1982 35790
1983 40930
1984 46040
1985 49530
1986 50580
1987 49000
1988 45850
1989 42900
1990 41250
1991 40680
1992 41560
1993 43390
1994 45290
1995 46310
1996 46110
1997 44630
1998 41960
1999 38560
2000 34880
2001 31320
2002 28040
2003 25380
2004 23480
2005 22040
2006 20930
2007 19870
2008 18790
2009 17570
2010 16170
2011 14750
2012 13300
2013 12020
2014 11020
2015 10260