Year	Number
1970	255287
1971	287565
1972	305651
1973	319124
1974	328460
1975	334607
1976	339034
1977	340515
1978	343455
1979	340222
1980	337522
1981	335239
1982	336740
1983	335651
1984	339101
1985	340135
1986	343616
1987	346137
1988	345202
1989	350277
1990	351021
1991	350104
1992	353154
1993	357402
1994	358367
1995	361877
1996	371250
1999	393030
2000	400408
2001	408249
2002	419904
2003	419903
2004	429837
2005	430152
2006	436945
2007	446176
2008	445107
2009	440627
2010	439746
2011	439698
2012	437277
2013	435973
2014	426637
2015	417556
2016	408961
2017	418852
2018	441755
2019	421965
2020	431959
2021	465799
2022	472860