Year	Number
1960	2166933
1961	2185217
1962	2195584
1963	2215389
1964	2241748
1965	2267137
1966	2284953
1967	2295089
1968	2295881
1969	2290913
1970	2279793
1971	2269259
1972	2258894
1973	2239199
1974	2211734
1975	2179830
1976	2144211
1977	2106878
1978	2068920
1979	2029688
1980	1993815
1981	1961509
1982	1932942
1983	1907581
1984	1882578
1985	1856788
1986	1832303
1987	1812482
1988	1802825
1989	1801253
1990	1804990
1991	1813403
1992	1821891
1993	1827354
1994	1826737
1995	1820907
1996	1814415
1997	1810079
1998	1806819
1999	1804980
2000	1805037
2001	1805998
2002	1805646
2003	1802777
2004	1799498
2005	1798169
2006	1798564
2007	1801583
2008	1810283
2009	1824709
2010	1844439
2011	1871384
2012	1884455
2013	1894939
2014	1904392
2015	1914607
2016	1922295
2017	1928036
2018	1934402
2019	1938686
2020	1937735
2021	1933517
2022	1932087
2023	1931829