Year Number of
1800 21200
1801 21210
1802 21220
1803 21230
1804 21240
1805 21250
1806 21260
1807 21260
1808 21270
1809 21280
1810 21290
1811 21310
1812 21330
1813 21360
1814 21390
1815 21430
1816 21470
1817 21520
1818 21580
1819 21650
1820 21720
1821 21800
1822 21880
1823 21970
1824 22070
1825 22170
1826 22280
1827 22400
1828 22520
1829 22650
1830 22790
1831 22930
1832 23080
1833 23220
1834 23370
1835 23510
1836 23660
1837 23810
1838 23960
1839 24110
1840 24260
1841 24420
1842 24570
1843 24730
1844 24880
1845 25040
1846 25200
1847 25360
1848 25520
1849 25680
1850 25840
1851 26000
1852 26160
1853 26320
1854 26490
1855 26650
1856 26820
1857 26990
1858 27160
1859 27320
1860 27490
1861 27660
1862 27840
1863 28010
1864 28190
1865 28360
1866 28540
1867 28720
1868 28890
1869 29070
1870 29260
1871 29440
1872 29620
1873 29800
1874 29990
1875 30170
1876 30360
1877 30550
1878 30740
1879 30930
1880 31120
1881 31310
1882 31510
1883 31700
1884 31900
1885 32100
1886 32300
1887 32500
1888 32700
1889 32900
1890 33100
1891 33310
1892 33520
1893 33730
1894 33940
1895 34150
1896 34350
1897 34560
1898 34760
1899 34960
1900 35150
1901 35340
1902 35520
1903 35700
1904 35870
1905 36040
1906 36210
1907 36360
1908 36520
1909 36670
1910 36810
1911 36960
1912 37100
1913 37240
1914 37380
1915 37520
1916 37660
1917 37810
1918 37960
1919 38100
1920 38250
1921 38390
1922 38540
1923 38690
1924 38840
1925 38990
1926 39240
1927 39440
1928 39700
1929 39900
1930 40180
1931 40460
1932 40730
1933 41000
1934 41270
1935 41540
1936 41810
1937 42070
1938 42330
1939 42600
1940 42850
1941 43110
1942 43370
1943 43620
1944 43880
1945 44130
1946 43310
1947 42630
1948 41830
1949 41160
1950 40360
1951 40290
1952 40250
1953 40180
1954 40070
1955 39930
1956 39750
1957 39530
1958 39270
1959 39030
1960 38800
1961 38580
1962 38380
1963 38180
1964 37970
1965 37720
1966 37380
1967 36940
1968 36500
1969 36120
1970 35920
1971 36140
1972 36590
1973 37730
1974 39200
1975 40950
1976 42920
1977 44980
1978 46970
1979 48800
1980 57600
1981 59240
1982 52430
1983 50480
1984 49040
1985 48560
1986 48720
1987 49380
1988 50240
1989 50800
1990 50590
1991 49820
1992 48980
1993 48440
1994 48680
1995 50030
1996 51400
1997 53500
1998 56080
1999 58600
2000 60660
2001 62240
2002 63140
2003 63640
2004 64200
2005 65150
2006 66300
2007 67350
2008 67980
2009 68050
2010 67650
2011 66510
2012 64920
2013 63200
2014 61500
2015 60540