Year	Number of
1800	1647
1801	1647
1802	1647
1803	1647
1804	1647
1805	1647
1806	1647
1807	1647
1808	1647
1809	1647
1810	1647
1811	1647
1812	1647
1813	1647
1814	1647
1815	1647
1816	1647
1817	1647
1818	1647
1819	1647
1820	1647
1821	1647
1822	1647
1823	1647
1824	1647
1825	1647
1826	1647
1827	1647
1828	1647
1829	1647
1830	1647
1831	1647
1832	1647
1833	1647
1834	1647
1835	1647
1836	1647
1837	1647
1838	1647
1839	1647
1840	1647
1841	1647
1842	1647
1843	1647
1844	1647
1845	1647
1846	1647
1847	1647
1848	1647
1849	1647
1850	1647
1851	1647
1852	1648
1853	1649
1854	1649
1855	1649
1856	1650
1857	1651
1858	1651
1859	1652
1860	1652
1861	1653
1862	1654
1863	1654
1864	1655
1865	1655
1866	1656
1867	1657
1868	1657
1869	1657
1870	1658
1871	1659
1872	1659
1873	1660
1874	1660
1875	1661
1876	1661
1877	1662
1878	1663
1879	1663
1880	1664
1881	1664
1882	1665
1883	1666
1884	1666
1885	1666
1886	1667
1887	1668
1888	1668
1889	1669
1890	1669
1891	1670
1892	1671
1893	1671
1894	1672
1895	1672
1896	1672
1897	1673
1898	1672
1899	1672
1900	1677
1901	1687
1902	1689
1903	1707
1904	1732
1905	1765
1906	1804
1907	1840
1908	1900
1909	1961
1910	2012
1911	2067
1912	2091
1913	2093
1914	2095
1915	2098
1916	2101
1917	2103
1918	2105
1919	2107
1920	2108
1921	2123
1922	2152
1923	2193
1924	2235
1925	2279
1926	2323
1927	2368
1928	2413
1929	2460
1930	2581
1931	2702
1932	2822
1933	2941
1934	3059
1935	3177
1936	3294
1937	3410
1938	3526
1939	3641
1940	3755
1941	3710
1942	3662
1943	3612
1944	3558
1945	3503
1946	3446
1947	3387
1948	3326
1949	3164
1950	2962
1951	2962
1952	2970
1953	2989
1954	3010
1955	3048
1956	3092
1957	3135
1958	3187
1959	3231
1960	3271
1961	3323
1962	3355
1963	3379
1964	3401
1965	3427
1966	3457
1967	3485
1968	3517
1969	3551
1970	3589
1971	3610
1972	3611
1973	3585
1974	3543
1975	3483
1976	3431
1977	3365
1978	3307
1979	3257
1980	3202
1981	3133
1982	3048
1983	2957
1984	2874
1985	2811
1986	2750
1987	2724
1988	2719
1989	2719
1990	2731
1991	2787
1992	2870
1993	2992
1994	3152
1995	3352
1996	3574
1997	3801
1998	4020
1999	4210
2000	4366
2001	4489
2002	4539
2003	4558
2004	4535
2005	4484
2006	4241
2007	4095
2008	4033
2009	3723
2010	3182
2011	2870
2012	2652
2013	2474
2014	2291
2015	2221
