Year	Number
1980	99430
1981	93973
1982	95118
1983	97368
1984	97815
1985	98000
1986	96472
1987	97601
1988	100976
1989	96217
1990	90542
1991	112316
1992	161722
1993	166245
1994	153787
1995	142426
1996	163870
1997	161961
1998	171753
1999	191401
2000	204843
2001	200690
2002	190235
2003	196039
2004	199480
2005	200131
2006	205797
2007	219661
2008	224231
2009	217062
2010	227012
2011	222070
2012	223012
2013	225391
2014	221770
2015	218330
2016	224785
2017	222576
2018	223725
2019	221382
2020	215964