Year	Number of
1980	55310
1981	59943
1982	64115
1983	62556
1984	62717
1985	59349
1986	55013
1987	57406
1988	61486
1989	68075
1990	80400
1991	77652
1992	82539
1993	89786
1994	90292
1995	73917
1996	109328
1997	125913
1998	142281
1999	148164
2000	151239
2001	148257
2002	215120
2003	227320
2004	267290
2005	270178
2006	303114
2007	315315
2008	348241
2009	360183
2010	354786
2011	362453
2012	323664
2013	312380
2014	306166
2015	287224
2016	237045
2017	243297
2018	227999
2019	209545
2020	191074