Year Number of
1800 153000
1801 153200
1802 153700
1803 154000
1804 154400
1805 154700
1806 155200
1807 155400
1808 155900
1809 156200
1810 156500
1811 157000
1812 157300
1813 157800
1814 158200
1815 158800
1816 170600
1817 171600
1818 176400
1819 181300
1820 174600
1821 183500
1822 176800
1823 170000
1824 163100
1825 204300
1826 185500
1827 190800
1828 189700
1829 188600
1830 187500
1831 186300
1832 185200
1833 203500
1834 217800
1835 189300
1836 203700
1837 214000
1838 197900
1839 212700
1840 218700
1841 206900
1842 217600
1843 214900
1844 207500
1845 186000
1846 192400
1847 180000
1848 172200
1849 198100
1850 205000
1851 207200
1852 204400
1853 211700
1854 203900
1855 185600
1856 208700
1857 227100
1858 251200
1859 265200
1860 268600
1861 266600
1862 292700
1863 279500
1864 267400
1865 254900
1866 242100
1867 228900
1868 256500
1869 260100
1870 289000
1871 274000
1872 265000
1873 281600
1874 285800
1875 276500
1876 280600
1877 270700
1878 274800
1879 286100
1880 283200
1881 280000
1882 291800
1883 296200
1884 292900
1885 312800
1886 314200
1887 315700
1888 324600
1889 341400
1890 334100
1891 334500
1892 318700
1893 334700
1894 350300
1895 349800
1896 341000
1897 332200
1898 323400
1899 322400
1900 321400
1901 312400
1902 311200
1903 294500
1904 293200
1905 284200
1906 290400
1907 288900
1908 279800
1909 276900
1910 267200
1911 257600
1912 252800
1913 261500
1914 268900
1915 215300
1916 199300
1917 176100
1918 175000
1919 239200
1920 254700
1921 243000
1922 238700
1923 243600
1924 236400
1925 237800
1926 220800
1927 209200
1928 204900
1929 212700
1930 201200
1931 197900
1932 199400
1933 172200
1934 191200
1935 167600
1936 187800
1937 178500
1938 182900
1939 176300
1940 169900
1941 163700
1942 157700
1943 151900
1944 146300
1945 140900
1946 135700
1947 130700
1948 125900
1949 119100
1950 119300
1951 131500
1952 107800
1953 100500
1954 94680
1955 91970
1956 77720
1957 70480
1958 65660
1959 56000
1960 48200
1961 41700
1962 35800
1963 30470
1964 25950
1965 22600
1966 20520
1967 19800
1968 20110
1969 20620
1970 20720
1971 20300
1972 19530
1973 18520
1974 17720
1975 17370
1976 17320
1977 17170
1978 16860
1979 16520
1980 16300
1981 16180
1982 16060
1983 15760
1984 15200
1985 14310
1986 13270
1987 12170
1988 11080
1989 10090
1990 9287
1991 8765
1992 8516
1993 8363
1994 8097
1995 7419
1996 6507
1997 5486
1998 4539
1999 3833
2000 3376
2001 3068
2002 2874
2003 2785
2004 2741
2005 2760
2006 2773
2007 2806
2008 2833
2009 2716
2010 2581
2011 2427
2012 2262
2013 2108
2014 1999
2015 1917