Year Number of
1800 197600
1801 197600
1802 197600
1803 197600
1804 197600
1805 197600
1806 197600
1807 197600
1808 197600
1809 197600
1810 197600
1811 197600
1812 197600
1813 197700
1814 197700
1815 197700
1816 197700
1817 197800
1818 197800
1819 197900
1820 197900
1821 198000
1822 198000
1823 198100
1824 198200
1825 198200
1826 198300
1827 198400
1828 198500
1829 198600
1830 198700
1831 198800
1832 198900
1833 199000
1834 199100
1835 199200
1836 199300
1837 199400
1838 199500
1839 199600
1840 199700
1841 199800
1842 200000
1843 200100
1844 200200
1845 200300
1846 200500
1847 200600
1848 200800
1849 200900
1850 201100
1851 201200
1852 201400
1853 201600
1854 201800
1855 202000
1856 202200
1857 202400
1858 202600
1859 202800
1860 203000
1861 203200
1862 203400
1863 203600
1864 203800
1865 204000
1866 204200
1867 204400
1868 204600
1869 204800
1870 204900
1871 205100
1872 205200
1873 205400
1874 205600
1875 205700
1876 205800
1877 206000
1878 206100
1879 206200
1880 206300
1881 206400
1882 206500
1883 206600
1884 206700
1885 206800
1886 206900
1887 207000
1888 207100
1889 207200
1890 207300
1891 207400
1892 207500
1893 207600
1894 207700
1895 207800
1896 207900
1897 208000
1898 208200
1899 208300
1900 208400
1901 208500
1902 208200
1903 208300
1904 211200
1905 213800
1906 216800
1907 219300
1908 222300
1909 220900
1910 220200
1911 219700
1912 221400
1913 222800
1914 223700
1915 224200
1916 225100
1917 225800
1918 226800
1919 227400
1920 228300
1921 229500
1922 231100
1923 232600
1924 230800
1925 227800
1926 224900
1927 221800
1928 218600
1929 217100
1930 211500
1931 205300
1932 199900
1933 194000
1934 186900
1935 179400
1936 172600
1937 166000
1938 159100
1939 155000
1940 151600
1941 155900
1942 160400
1943 164900
1944 169600
1945 174500
1946 179400
1947 184500
1948 189800
1949 195100
1950 200700
1951 269300
1952 214000
1953 174000
1954 145000
1955 124800
1956 110100
1957 99040
1958 90880
1959 84850
1960 80330
1961 77400
1962 75770
1963 74320
1964 72510
1965 69670
1966 65490
1967 61420
1968 57040
1969 52230
1970 47190
1971 42040
1972 37080
1973 32190
1974 27620
1975 23430
1976 19600
1977 16180
1978 13430
1979 11400
1980 10040
1981 9270
1982 8953
1983 8752
1984 8462
1985 7900
1986 7092
1987 6099
1988 5165
1989 4468
1990 4100
1991 4047
1992 4127
1993 4320
1994 4408
1995 4282
1996 4046
1997 3794
1998 3567
1999 3390
2000 3275
2001 3241
2002 3228
2003 3218
2004 3058
2005 2882
2006 2665
2007 2445
2008 2272
2009 2145
2010 2019
2011 1954
2012 1830
2013 1748
2014 1670
2015 1559