Year	Number
1976	293723
1978	284644
1979	280593
1980	272277
1981	269016
1982	267850
1983	267200
1984	270990
1985	272935
1986	274660
1987	272585
1988	271728
1989	275426
1990	278446
1991	284616
1992	281770
1993	279500
1994	288092
1995	295137
1996	301051
1997	303632
1998	299164
1999	292070
2000	283249
2001	274233
2002	263603
2003	252829
2004	240487
2005	237975
2006	222402
2007	210125
2008	199454
2009	236102
2010	224781
2011	215660
2012	206617
2013	198897
2014	195720
2015	188371
2016	179564
2017	174836
2018	170861
2019	167104
2020	162170
2021	158528
2022	154140