Year	Number
1973	819870
1974	690203
1975	595498
1976	608778
1977	689022
1978	683498
1979	701356
1980	682765
1981	689131
1982	710871
1983	719643
1984	660805
1985	629358
1986	578800
1987	538820
1988	515283
1989	521559
1990	560494
1991	546756
1992	547693
1993	589962
1994	594522
1995	568059
1996	565273
1997	518697
1999	289421
2000	232632
2001	129143
2002	58397
2003	38875
2004	26637
2005	19763
2006	38205
2007	55786
2008	38694
2009	31348
2010	30761
2011	23631
2012	19201
2013	13746
2014	14227
2015	12378
2016	15313
2017	9352
2018	5209
2019	5260
2020	13261
2021	8909
2022	29307
2023	46538