Year	Number
1960	877687
1961	875054
1962	869430
1963	859731
1964	845988
1965	829940
1966	821950
1967	815761
1968	809148
1969	804241
1970	799782
1971	798124
1972	800151
1973	804121
1974	805832
1975	805119
1976	805956
1977	807880
1978	809538
1979	810605
1980	809799
1981	807696
1982	804183
1983	800814
1984	797205
1985	793565
1986	792250
1987	789018
1988	783315
1989	775277
1990	765137
1991	756075
1992	749458
1993	740964
1994	731791
1995	709728
1996	698831
1997	686806
1998	669429
1999	648980
2000	631924
2001	620977
2002	612726
2003	603903
2004	595093
2005	585459
2006	574535
2007	564322
2008	555249
2009	547033
2010	539285
2011	529602
2012	522977
2013	521824
2014	524279
2015	524020
2016	519832
2017	513810
2018	507978
2019	504373
2020	503416
2021	503610
2022	496882
2023	497364