Year	Number
1960	56992
1961	62187
1962	67984
1963	74453
1964	81695
1965	89777
1966	98849
1967	109031
1968	122096
1969	141174
1970	163310
1971	188970
1972	218765
1973	253227
1974	293258
1975	339713
1976	386053
1977	430379
1978	480348
1979	536655
1980	600258
1981	649068
1982	682078
1983	716927
1984	753780
1985	792594
1986	834671
1987	880083
1988	928205
1989	978995
1990	1032825
1991	1089813
1992	1150234
1993	1214038
1994	1281699
1995	1353365
1996	1437696
1997	1534805
1998	1638771
1999	1749940
2000	1868989
2001	1995957
2002	2131938
2003	2277389
2004	2433205
2005	2599442
2006	2783471
2007	2985683
2008	3203222
2009	3436292
2010	3687047
2011	3898904
2012	4123528.0000000005
2013	4360719
2014	4612224
2015	4878572
2016	5160660
2017	5459439
2018	5775924
2019	5914068
2020	6045809
2021	6169943
2022	6289896
2023	6405440