Year	Number
1970	61068
1971	67688
1972	77828
1973	94490
1974	106511
1975	111538
1976	116037
1977	121202
1979	134350
1980	135830
1981	133909
1982	130347
1983	122836
1984	117412
1985	112531
1986	114655
1987	116928
1988	118357
1989	123052
1990	130553
1991	139303
1992	151513
1993	160291
1994	169777
1995	179440
1996	183162
1997	192678
1998	227328
1999	254597
2000	255643
2001	280341
2002	288965
2004	339763
2005	347244
2006	374428
2007	377924
2008	380813
2009	405584
2010	413686
2011	419453
2012	427760
2013	447280
2014	460235
2015	460252
2016	462855
2017	467513
2018	476668
2019	504316
2020	505328
2021	528269
2022	501018