Year	Number
1960	1811120
1961	1824272
1962	1837537
1963	1850900
1964	1864378
1965	1877916
1966	1891572
1967	1905327
1968	1919201
1969	1933138
1970	1945954
1971	1957585
1972	1969301
1973	1981056
1974	1992896
1975	2004808
1976	2016807
1977	2028845
1978	2040971
1979	2053170
1980	2057204.0000000002
1981	2052908
1982	2048614
1983	2044330
1984	2040048
1985	2035788
1986	2031530
1987	2027281
1988	2023036
1989	2018811
1990	2005208
1991	1982269
1992	1959561
1993	1937175
1994	1915015
1995	1893108
1996	1871422
1997	1850043
1998	1828879
1999	1807957
2000	1787247
2001	1773401
2002	1769025
2003	1764659
2004	1760298
2005	1755959
2006	1751626
2007	1747303
2008	1742984
2009	1738689
2010	1734398
2011	1730117
2012	1732397
2013	1736880
2014	1741381
2015	1745894
2016	1750425
2017	1754955
2018	1759497
2019	1763913
2020	1768073
2021	1771865
2022	1775207
2023	1778052