Year Number of
1800 19960
1801 19960
1802 19960
1803 19960
1804 19960
1805 19960
1806 19960
1807 19960
1808 19960
1809 19960
1810 19960
1811 19970
1812 19980
1813 20000
1814 20030
1815 20070
1816 20110
1817 20160
1818 20220
1819 20280
1820 20360
1821 20440
1822 20530
1823 20620
1824 20730
1825 20840
1826 20960
1827 21090
1828 21220
1829 21360
1830 21520
1831 21680
1832 21840
1833 22000
1834 22160
1835 22330
1836 22500
1837 22660
1838 22830
1839 23000
1840 23170
1841 23340
1842 23510
1843 23670
1844 23830
1845 23990
1846 24140
1847 24300
1848 24450
1849 24600
1850 24740
1851 24920
1852 25090
1853 25260
1854 25430
1855 25600
1856 25760
1857 25920
1858 26080
1859 26230
1860 26380
1861 26530
1862 26680
1863 26830
1864 26980
1865 27140
1866 27290
1867 27440
1868 27600
1869 27750
1870 27910
1871 28060
1872 28220
1873 28380
1874 28540
1875 28700
1876 28860
1877 29020
1878 29180
1879 29340
1880 29510
1881 29670
1882 29840
1883 30000
1884 30170
1885 30340
1886 30500
1887 30670
1888 30840
1889 31020
1890 31190
1891 31360
1892 31540
1893 31710
1894 31890
1895 32060
1896 32250
1897 32440
1898 32640
1899 32850
1900 33190
1901 33420
1902 33620
1903 33860
1904 34120
1905 34390
1906 34650
1907 34900
1908 35160
1909 35410
1910 35660
1911 35910
1912 36160
1913 36530
1914 37040
1915 37670
1916 38320
1917 38980
1918 39590
1919 40210
1920 40760
1921 41180
1922 41520
1923 41860
1924 42200
1925 42540
1926 42890
1927 43240
1928 43590
1929 43940
1930 44340
1931 44730
1932 45110
1933 45500
1934 45880
1935 46250
1936 46620
1937 47000
1938 47360
1939 47720
1940 48080
1941 47390
1942 46690
1943 45990
1944 45430
1945 44730
1946 44870
1947 45010
1948 45150
1949 45280
1950 45410
1951 45320
1952 45480
1953 45650
1954 45840
1955 46040
1956 46260
1957 46500
1958 46750
1959 47010
1960 44510
1961 43940
1962 43810
1963 43920
1964 44040
1965 44050
1966 43900
1967 43500
1968 42920
1969 42320
1970 41860
1971 41430
1972 40900
1973 40320
1974 39750
1975 39250
1976 38810
1977 38370
1978 37910
1979 37430
1980 36960
1981 36470
1982 35870
1983 35150
1984 34340
1985 33510
1986 32660
1987 31710
1988 30750
1989 29820
1990 28920
1991 28040
1992 27220
1993 26390
1994 25550
1995 24730
1996 23910
1997 23020
1998 22080
1999 21120
2000 20140
2001 19160
2002 18130
2003 17150
2004 16170
2005 15280
2006 14440
2007 13640
2008 12920
2009 12240
2010 11660
2011 11110
2012 10620
2013 10130
2014 9743
2015 9415