Year	Number
1971	4939683
1972	4853725
1973	4759935
1974	4724128
1975	4670406
1976	4601550
1977	4568134
1978	4618436
1979	4647552
1980	4650954
1981	4610361
1982	4535613
1983	4387003
1984	4259598
1985	4126435
1986	4115846
1987	4118403
1988	4151664
1989	4176391
1990	4163161
1991	4149143
1992	4109797
1993	4060408
1994	4078370
1995	4071599
1996	4065005
1997	4004704
1998	3979453
1999	3944227
2000	3884560
2001	3837902
2002	3807739
2003	3791555
2004	3783197
2005	4015490
2006	4051861
2007	4105628
2008	4139284
2009	4152622
2010	4159086
2011	4171826
2012	4155596
2013	4171003
2014	4188552
2015	4255988
2016	4284172
2017	4309942
2018	4302412
2019	4299109
2020	4279257
2021	4258764
2022	4213547