Year Number of
1800 21650
1801 21650
1802 21650
1803 21650
1804 21650
1805 21650
1806 21650
1807 21650
1808 21650
1809 21650
1810 21650
1811 21660
1812 21700
1813 21760
1814 21840
1815 21930
1816 22050
1817 22190
1818 22350
1819 22530
1820 22730
1821 22950
1822 23200
1823 23470
1824 23770
1825 24080
1826 24430
1827 24790
1828 25190
1829 25600
1830 26050
1831 26520
1832 27000
1833 27490
1834 27990
1835 28490
1836 29010
1837 29530
1838 30070
1839 30610
1840 31160
1841 31710
1842 32240
1843 32770
1844 33290
1845 33790
1846 34290
1847 34770
1848 35250
1849 35710
1850 36160
1851 36610
1852 37060
1853 37480
1854 37900
1855 38300
1856 38690
1857 39070
1858 39430
1859 39770
1860 40100
1861 40440
1862 40790
1863 41180
1864 41580
1865 42010
1866 42470
1867 42950
1868 43460
1869 43990
1870 44560
1871 45150
1872 45770
1873 46290
1874 46980
1875 47700
1876 48460
1877 49170
1878 50010
1879 50900
1880 51800
1881 52680
1882 53610
1883 54560
1884 55480
1885 56470
1886 57470
1887 58450
1888 59490
1889 60540
1890 61610
1891 62700
1892 63810
1893 64940
1894 66090
1895 67250
1896 68450
1897 69690
1898 70950
1899 72260
1900 73600
1901 75210
1902 76780
1903 78490
1904 80250
1905 82070
1906 83910
1907 85700
1908 87340
1909 89010
1910 90690
1911 92380
1912 94120
1913 96030
1914 98150
1915 95070
1916 92090
1917 89190
1918 86540
1919 83990
1920 81510
1921 79100
1922 76770
1923 74440
1924 72180
1925 61960
1926 79870
1927 79530
1928 71220
1929 68200
1930 58840
1931 74260
1932 82940
1933 92550
1934 75110
1935 108200
1936 108900
1937 109400
1938 117400
1939 125300
1940 111100
1941 121200
1942 127800
1943 133600
1944 134800
1945 133900
1946 135800
1947 128200
1948 126500
1949 126900
1950 118100
1951 114400
1952 105800
1953 118400
1954 113600
1955 109200
1956 105100
1957 101300
1958 97650
1959 88180
1960 88560
1961 89160
1962 90100
1963 91110
1964 91760
1965 91920
1966 91510
1967 90420
1968 88420
1969 85570
1970 81960
1971 77510
1972 72350
1973 67110
1974 62570
1975 59210
1976 56780
1977 55510
1978 54640
1979 53480
1980 51650
1981 49150
1982 46170
1983 43100
1984 40210
1985 37830
1986 35860
1987 34320
1988 33110
1989 32040
1990 31100
1991 30330
1992 29620
1993 28910
1994 27980
1995 26960
1996 25660
1997 24290
1998 22880
1999 21690
2000 20710
2001 20040
2002 19660
2003 19340
2004 18940
2005 18360
2006 17690
2007 16850
2008 15940
2009 15070
2010 14310
2011 13740
2012 13190
2013 12770
2014 12360
2015 11930