Year	Number of
1800	20010
1801	20010
1802	20010
1803	20010
1804	20010
1805	20010
1806	20010
1807	20010
1808	20010
1809	20010
1810	20010
1811	20020
1812	20030
1813	20050
1814	20080
1815	20120
1816	20160
1817	20210
1818	20260
1819	20330
1820	20400
1821	20480
1822	20560
1823	20650
1824	20750
1825	20860
1826	20980
1827	21100
1828	21230
1829	21370
1830	21510
1831	21670
1832	21820
1833	21980
1834	22140
1835	22300
1836	22460
1837	22620
1838	22780
1839	22940
1840	23110
1841	23270
1842	23440
1843	23610
1844	23780
1845	23950
1846	24120
1847	24290
1848	24460
1849	24640
1850	24820
1851	24990
1852	25170
1853	25340
1854	25520
1855	25700
1856	25880
1857	26070
1858	26250
1859	26440
1860	26620
1861	26810
1862	27000
1863	27190
1864	27380
1865	27570
1866	27770
1867	27960
1868	28160
1869	28360
1870	28560
1871	28760
1872	28960
1873	29160
1874	29370
1875	29580
1876	29780
1877	29990
1878	30200
1879	30410
1880	30630
1881	30840
1882	31060
1883	31280
1884	31490
1885	31710
1886	31940
1887	32160
1888	32390
1889	32610
1890	32840
1891	33080
1892	33310
1893	33540
1894	33780
1895	34010
1896	34250
1897	34480
1898	34710
1899	34940
1900	35160
1901	35380
1902	35580
1903	35790
1904	36000
1905	36200
1906	36390
1907	36580
1908	36760
1909	36940
1910	37120
1911	37300
1912	37470
1913	37640
1914	37820
1915	37990
1916	38170
1917	38340
1918	38530
1919	38710
1920	38890
1921	39070
1922	39260
1923	39440
1924	39630
1925	39820
1926	40000
1927	40190
1928	40380
1929	40560
1930	40940
1931	41310
1932	41680
1933	42050
1934	42420
1935	42780
1936	43140
1937	43500
1938	43860
1939	44210
1940	44560
1941	42960
1942	41390
1943	39840
1944	38310
1945	36600
1946	34960
1947	33390
1948	31890
1949	30460
1950	29080
1951	27860
1952	27050
1953	25570
1954	26410
1955	26660
1956	26720
1957	26250
1958	25510
1959	24820
1960	24470
1961	24320
1962	24580
1963	25060
1964	25480
1965	25690
1966	25760
1967	25670
1968	25580
1969	25680
1970	26030
1971	26590
1972	27380
1973	28330
1974	29350
1975	30400
1976	31440
1977	32370
1978	33140
1979	33580
1980	33720
1981	33320
1982	32570
1983	31630
1984	30510
1985	29440
1986	28530
1987	27840
1988	27550
1989	27780
1990	28570
1991	29990
1992	31760
1993	33700
1994	35530
1995	37320
1996	39020
1997	40260
1998	41070
1999	41630
2000	41970
2001	42270
2002	42530
2003	42650
2004	42990
2005	43480
2006	43650
2007	43900
2008	43930
2009	44040
2010	43670
2011	42860
2012	40170
2013	39030
2014	38530
2015	38090
