Year Number of
1800 20640
1801 20640
1802 20640
1803 20640
1804 20640
1805 20640
1806 20640
1807 20640
1808 20640
1809 20640
1810 20640
1811 20650
1812 20660
1813 20680
1814 20710
1815 20740
1816 20780
1817 20830
1818 20880
1819 20940
1820 21010
1821 21090
1822 21170
1823 21260
1824 21360
1825 21460
1826 21570
1827 21690
1828 21820
1829 21950
1830 22090
1831 22240
1832 22390
1833 22540
1834 22690
1835 22840
1836 23000
1837 23150
1838 23310
1839 23470
1840 23620
1841 23780
1842 23940
1843 24100
1844 24270
1845 24430
1846 24600
1847 24760
1848 24930
1849 25100
1850 25260
1851 25440
1852 25620
1853 25800
1854 25980
1855 26170
1856 26350
1857 26540
1858 26720
1859 26910
1860 27100
1861 27290
1862 27480
1863 27680
1864 27870
1865 28070
1866 28270
1867 28470
1868 28670
1869 28870
1870 29070
1871 29280
1872 29480
1873 29680
1874 29890
1875 30100
1876 30320
1877 30530
1878 30740
1879 30960
1880 31180
1881 31390
1882 31610
1883 31840
1884 32060
1885 32280
1886 32510
1887 32740
1888 32960
1889 33200
1890 33430
1891 33670
1892 33900
1893 34140
1894 34380
1895 34620
1896 34860
1897 35100
1898 35330
1899 35560
1900 35780
1901 36000
1902 36220
1903 36430
1904 36640
1905 36840
1906 37040
1907 37230
1908 37410
1909 37600
1910 37780
1911 37960
1912 38140
1913 38310
1914 38490
1915 38670
1916 38850
1917 39030
1918 39200
1919 39360
1920 39540
1921 39700
1922 39880
1923 40400
1924 40820
1925 41360
1926 41980
1927 42740
1928 42740
1929 42880
1930 43230
1931 43700
1932 44030
1933 44480
1934 44780
1935 45200
1936 45480
1937 45880
1938 46140
1939 46370
1940 46600
1941 46240
1942 45870
1943 45500
1944 43220
1945 43110
1946 43030
1947 42920
1948 42850
1949 42740
1950 37360
1951 38450
1952 39550
1953 40440
1954 41140
1955 41830
1956 42820
1957 43380
1958 43750
1959 44250
1960 45190
1961 46320
1962 47620
1963 49000
1964 50440
1965 51860
1966 53220
1967 54320
1968 55200
1969 56080
1970 56950
1971 57930
1972 58420
1973 58450
1974 58040
1975 57300
1976 56730
1977 55580
1978 54260
1979 53060
1980 52230
1981 51640
1982 50940
1983 50150
1984 49200
1985 48160
1986 46860
1987 45590
1988 44540
1989 43900
1990 43760
1991 44290
1992 45170
1993 46300
1994 47550
1995 48880
1996 50230
1997 51140
1998 51580
1999 51420
2000 50600
2001 49200
2002 47300
2003 45150
2004 42850
2005 40540
2006 38360
2007 36200
2008 34190
2009 32430
2010 30940
2011 29730
2012 28890
2013 28310
2014 27780
2015 27060