Year	Number
1960	15687688
1961	16182414
1962	16691282
1963	17210956
1964	17739754
1965	18275814
1966	18811407
1967	19343961
1968	19872503
1969	20392264
1970	20905254
1971	21405413
1972	21898055
1973	22396318
1974	22897871
1975	23403731
1976	23913002
1977	24443926
1978	25003608
1979	25579323
1980	26176195
1981	26785982
1982	27405194
1983	28042329
1984	28689032
1985	29326260
1986	29960101
1987	30603048
1988	31256727
1989	31923117
1990	32601393
1991	33272628
1992	33939039
1993	34614735
1994	35295461
1995	35970101
1996	36632573
1997	37291946
1998	37944414
1999	38585033
2000	39215135
2001	39837875
2002	40454050
2003	41057687
2004	41648268
2005	42220940
2006	42772910
2007	43306582
2008	43815313
2009	44313917
2010	44816108
2011	45308899
2012	45782417
2013	46237930
2014	46677947
2015	47119728
2016	47625955
2017	48351671
2018	49276961
2019	50187406
2020	50930662
2021	51516562
2022	51874024
2023	52085168