Year	Number of
1800	21770
1801	21770
1802	21770
1803	21770
1804	21770
1805	21770
1806	21770
1807	21770
1808	21770
1809	21770
1810	21770
1811	21780
1812	21790
1813	21810
1814	21840
1815	21880
1816	21920
1817	21970
1818	22030
1819	22090
1820	22160
1821	22240
1822	22330
1823	22430
1824	22530
1825	22640
1826	22760
1827	22890
1828	23020
1829	23170
1830	23320
1831	23480
1832	23640
1833	23800
1834	23960
1835	24120
1836	24290
1837	24450
1838	24620
1839	24790
1840	24950
1841	25120
1842	25300
1843	25470
1844	25640
1845	25820
1846	25990
1847	26170
1848	26350
1849	26530
1850	26710
1851	26880
1852	27060
1853	27250
1854	27430
1855	27610
1856	27800
1857	27980
1858	28170
1859	28360
1860	28550
1861	28740
1862	28930
1863	29130
1864	29320
1865	29520
1866	29710
1867	29910
1868	30110
1869	30320
1870	30520
1871	30720
1872	30930
1873	31130
1874	31340
1875	31550
1876	31760
1877	31970
1878	32180
1879	32400
1880	32610
1881	32830
1882	33050
1883	33270
1884	33490
1885	33710
1886	33940
1887	34160
1888	34390
1889	34620
1890	34850
1891	35090
1892	35320
1893	35560
1894	35790
1895	36030
1896	36270
1897	36500
1898	36730
1899	36960
1900	37180
1901	37390
1902	37600
1903	37810
1904	38010
1905	38210
1906	38400
1907	38580
1908	38760
1909	38940
1910	39110
1911	39280
1912	39450
1913	39620
1914	39790
1915	39960
1916	40120
1917	40290
1918	40460
1919	40630
1920	40800
1921	40970
1922	41140
1923	41310
1924	41490
1925	41660
1926	41780
1927	41950
1928	42060
1929	42180
1930	42650
1931	43120
1932	43580
1933	44040
1934	44500
1935	44960
1936	45410
1937	45860
1938	46300
1939	46740
1940	47180
1941	47620
1942	48050
1943	48480
1944	48910
1945	49340
1946	49760
1947	49830
1948	49900
1949	49960
1950	50020
1951	50380
1952	51600
1953	52880
1954	54230
1955	55640
1956	56310
1957	50140
1958	51180
1959	52290
1960	53410
1961	54260
1962	54910
1963	55600
1964	56320
1965	57300
1966	58160
1967	59070
1968	60120
1969	61130
1970	62190
1971	62880
1972	63300
1973	63470
1974	63440
1975	63230
1976	62960
1977	62750
1978	62670
1979	62760
1980	63050
1981	63480
1982	63920
1983	64480
1984	65290
1985	66390
1986	67870
1987	69630
1988	71580
1989	73770
1990	76080
1991	78440
1992	80760
1993	83150
1994	85560
1995	87830
1996	90400
1997	92670
1998	94320
1999	95230
2000	95240
2001	94970
2002	93820
2003	92060
2004	90120
2005	88140
2006	86230
2007	84270
2008	82080
2009	80680
2010	79630
2011	78800
2012	77980
2013	77120
2014	76130
2015	75390
