Year	Number
1960	221954
1961	226631
1962	232115
1963	239085
1964	247472
1965	256112
1966	264803
1967	273899
1968	283432
1969	293441
1970	303942
1971	315001
1972	326744
1973	339271
1974	353113
1975	368679
1976	386046
1977	405435
1978	426968
1979	450757
1980	476922
1981	505543
1982	536575
1983	569711
1984	604438
1985	641279
1986	677644
1987	710420
1988	740011
1989	766874
1990	791350
1991	813499
1992	833092
1993	849267
1994	862154
1995	871636
1996	877145
1997	879180
1998	878447
1999	875792
2000	871638
2001	866107
2002	859494
2003	851776
2004	840170
2005	824231
2006	807356
2007	791873
2008	779636
2009	772242
2010	775653
2011	791624
2012	813909
2013	845331
2014	888079
2015	933388
2016	974482
2017	1014926
2018	1058713
2019	1108789
2020	1165085
2021	1210110
2022	1236831
2023	1254121