Year Number of
1800 18940
1801 18940
1802 18940
1803 18940
1804 18940
1805 18940
1806 18940
1807 18940
1808 18940
1809 18940
1810 18940
1811 18950
1812 18960
1813 18980
1814 19000
1815 19030
1816 19060
1817 19100
1818 19150
1819 19200
1820 19260
1821 19320
1822 19390
1823 19460
1824 19550
1825 19630
1826 19730
1827 19830
1828 19930
1829 20050
1830 20160
1831 20290
1832 20420
1833 20540
1834 20670
1835 20800
1836 20930
1837 21060
1838 21190
1839 21320
1840 21450
1841 21580
1842 21720
1843 21850
1844 21990
1845 22120
1846 22260
1847 22400
1848 22540
1849 22680
1850 22820
1851 22970
1852 23130
1853 23290
1854 23450
1855 23620
1856 23780
1857 23940
1858 24110
1859 24280
1860 24440
1861 24610
1862 24780
1863 24950
1864 25130
1865 25300
1866 25480
1867 25650
1868 25830
1869 26010
1870 26190
1871 26370
1872 26550
1873 26730
1874 26910
1875 27100
1876 27290
1877 27470
1878 27660
1879 27850
1880 28040
1881 28240
1882 28430
1883 28630
1884 28820
1885 29020
1886 29220
1887 29420
1888 29620
1889 29830
1890 30030
1891 30240
1892 30450
1893 30660
1894 30870
1895 31080
1896 31290
1897 31500
1898 31700
1899 31900
1900 32100
1901 32290
1902 32480
1903 32660
1904 32840
1905 33020
1906 33200
1907 33360
1908 33520
1909 33680
1910 33840
1911 33990
1912 34150
1913 34300
1914 34450
1915 34600
1916 34760
1917 34940
1918 35080
1919 35240
1920 35400
1921 35550
1922 35710
1923 35860
1924 36020
1925 36180
1926 36530
1927 36830
1928 37180
1929 37490
1930 37840
1931 37720
1932 37600
1933 37580
1934 37440
1935 37300
1936 37150
1937 36990
1938 36950
1939 36780
1940 36610
1941 36430
1942 36250
1943 36180
1944 35990
1945 35460
1946 34950
1947 34430
1948 33920
1949 33420
1950 32920
1951 32920
1952 33580
1953 34080
1954 34410
1955 34660
1956 31640
1957 31650
1958 31580
1959 31390
1960 31050
1961 30870
1962 30460
1963 30100
1964 30060
1965 30570
1966 31280
1967 32410
1968 34000
1969 35880
1970 37980
1971 40290
1972 42770
1973 45600
1974 48910
1975 52500
1976 56020
1977 58710
1978 59710
1979 58810
1980 56680
1981 53900
1982 51040
1983 48860
1984 47950
1985 48100
1986 49000
1987 50670
1988 52240
1989 52460
1990 50490
1991 47780
1992 42470
1993 37970
1994 55560
1995 44300
1996 32740
1997 44150
1998 58560
1999 60030
2000 60830
2001 59720
2002 54460
2003 47480
2004 40790
2005 35750
2006 32090
2007 29360
2008 27180
2009 25320
2010 23400
2011 21080
2012 18760
2013 16820
2014 15250
2015 14210