Year	Number
1960	2112675
1961	2185102
1962	2264514
1963	2349938
1964	2441065
1965	2537904
1966	2640472
1967	2750465
1968	2869387
1969	2997831
1970	3138500
1971	3296426
1972	3476608
1973	3678640
1974	3898052
1975	4143899
1976	4409023
1977	4682826
1978	4969329
1979	5264577
1980	5570413
1981	5885125
1982	6208137
1983	6544204
1984	6890859
1985	7244513
1986	7603359
1987	7967798
1988	8341808
1989	8724566
1990	9114257
1991	9500950
1992	9870913
1993	10199979
1994	10504597
1995	10806201
1996	11100958
1997	11401339
1998	11706297
1999	12011628
2000	12317247
2001	12623833
2002	12928084
2003	13221628
2004	13489705
2005	13900240
2006	14481085
2007	15083370
2008	15700185
2009	16324114
2010	16865108
2011	17276508
2012	17644476
2013	18009033
2014	18364145
2015	18774108
2016	19291301
2017	19828621
2018	20335495
2019	20836089
2020	20886852
2021	20766246
2022	20979233
2023	21246137