Year	Number of
1800	21650
1801	21650
1802	21650
1803	21650
1804	21650
1805	21650
1806	21650
1807	21650
1808	21650
1809	21650
1810	21650
1811	21660
1812	21700
1813	21760
1814	21840
1815	21930
1816	22050
1817	22190
1818	22350
1819	22530
1820	22730
1821	22950
1822	23200
1823	23470
1824	23770
1825	24080
1826	24430
1827	24790
1828	25190
1829	25600
1830	26050
1831	26520
1832	27000
1833	27490
1834	27990
1835	28490
1836	29010
1837	29530
1838	30070
1839	30610
1840	31160
1841	31710
1842	32240
1843	32770
1844	33290
1845	33790
1846	34290
1847	34770
1848	35250
1849	35710
1850	36160
1851	36610
1852	37060
1853	37480
1854	37900
1855	38300
1856	38690
1857	39070
1858	39430
1859	39770
1860	40100
1861	40440
1862	40790
1863	41180
1864	41580
1865	42010
1866	42470
1867	42950
1868	43460
1869	43990
1870	44560
1871	45150
1872	45770
1873	46290
1874	46980
1875	47700
1876	48460
1877	49170
1878	50010
1879	50900
1880	51800
1881	52680
1882	53610
1883	54560
1884	55480
1885	56470
1886	57470
1887	58450
1888	59490
1889	60540
1890	61610
1891	62700
1892	63810
1893	64940
1894	66090
1895	67250
1896	68450
1897	69690
1898	70950
1899	72260
1900	73600
1901	75210
1902	76780
1903	78490
1904	80250
1905	82070
1906	83910
1907	85700
1908	87340
1909	89010
1910	90690
1911	92380
1912	94120
1913	96030
1914	98150
1915	95070
1916	92090
1917	89190
1918	86540
1919	83990
1920	81510
1921	79100
1922	76770
1923	74440
1924	72180
1925	61960
1926	79870
1927	79530
1928	71220
1929	68200
1930	58840
1931	74260
1932	82940
1933	92550
1934	75110
1935	108200
1936	108900
1937	109400
1938	117400
1939	125300
1940	111100
1941	121200
1942	127800
1943	133600
1944	134800
1945	133900
1946	135800
1947	128200
1948	126500
1949	126900
1950	118100
1951	114400
1952	105800
1953	118400
1954	113600
1955	109200
1956	105100
1957	101300
1958	97650
1959	88180
1960	88560
1961	89160
1962	90100
1963	91110
1964	91760
1965	91920
1966	91510
1967	90420
1968	88420
1969	85570
1970	81960
1971	77510
1972	72350
1973	67110
1974	62570
1975	59210
1976	56780
1977	55510
1978	54640
1979	53480
1980	51650
1981	49150
1982	46170
1983	43100
1984	40210
1985	37830
1986	35860
1987	34320
1988	33110
1989	32040
1990	31100
1991	30330
1992	29620
1993	28910
1994	27980
1995	26960
1996	25660
1997	24290
1998	22880
1999	21690
2000	20710
2001	20040
2002	19660
2003	19340
2004	18940
2005	18360
2006	17690
2007	16850
2008	15940
2009	15070
2010	14310
2011	13740
2012	13190
2013	12770
2014	12360
2015	11930
