Year Number of
1800 22950
1801 22950
1802 22950
1803 22960
1804 22960
1805 22960
1806 22960
1807 22970
1808 22970
1809 22970
1810 22970
1811 22990
1812 23020
1813 23070
1814 23140
1815 23220
1816 23320
1817 23430
1818 23560
1819 23710
1820 23880
1821 24060
1822 24260
1823 24480
1824 24710
1825 24970
1826 25240
1827 25540
1828 25850
1829 26180
1830 26540
1831 26910
1832 27280
1833 27670
1834 28060
1835 28450
1836 28850
1837 29260
1838 29670
1839 30080
1840 30500
1841 30930
1842 31360
1843 31800
1844 32240
1845 32690
1846 33140
1847 33600
1848 34060
1849 34520
1850 35000
1851 35480
1852 35960
1853 36460
1854 36960
1855 37460
1856 37970
1857 38480
1858 39010
1859 39530
1860 40070
1861 40600
1862 41150
1863 41690
1864 42250
1865 42810
1866 43380
1867 43950
1868 44520
1869 45110
1870 45700
1871 46290
1872 46900
1873 47490
1874 48100
1875 48720
1876 49350
1877 49960
1878 50600
1879 51240
1880 51900
1881 52530
1882 53200
1883 53880
1884 54540
1885 55210
1886 55850
1887 56530
1888 57150
1889 57730
1890 58290
1891 58820
1892 59360
1893 59900
1894 60450
1895 61010
1896 61560
1897 62150
1898 62780
1899 63440
1900 64140
1901 64780
1902 65430
1903 66090
1904 66750
1905 67410
1906 68060
1907 68680
1908 69330
1909 69960
1910 70600
1911 71230
1912 71860
1913 72480
1914 73110
1915 73750
1916 74390
1917 75030
1918 75660
1919 76300
1920 77030
1921 77840
1922 78730
1923 79630
1924 80550
1925 81480
1926 82410
1927 83350
1928 84310
1929 85270
1930 87190
1931 89110
1932 91010
1933 92900
1934 94770
1935 96640
1936 98490
1937 100300
1938 102200
1939 104000
1940 105800
1941 105200
1942 104200
1943 105700
1944 107300
1945 108800
1946 110300
1947 111800
1948 113300
1949 114700
1950 116200
1951 117000
1952 114600
1953 112700
1954 110400
1955 108100
1956 106400
1957 104200
1958 102500
1959 101300
1960 100800
1961 100300
1962 99970
1963 99410
1964 98540
1965 97240
1966 95760
1967 93960
1968 92010
1969 90140
1970 88340
1971 86550
1972 84580
1973 82670
1974 81010
1975 79770
1976 79150
1977 79040
1978 79240
1979 79140
1980 78350
1981 76770
1982 74110
1983 70630
1984 67000
1985 63800
1986 60920
1987 58630
1988 56780
1989 54870
1990 52690
1991 50150
1992 47100
1993 43710
1994 40270
1995 36910
1996 33820
1997 30920
1998 28280
1999 25900
2000 23780
2001 21980
2002 20440
2003 19120
2004 17920
2005 16870
2006 15890
2007 14950
2008 14060
2009 13340
2010 12680
2011 12120
2012 11660
2013 11270
2014 10840
2015 10480