Year	Number of
1980	40096
1981	42423
1982	52403
1983	56824
1984	65045
1985	71731
1986	80846
1987	85867
1988	95521
1989	80795
1990	88634
1991	60006
1992	60006
1994	99329
1995	26034
1996	41889
1997	59105
1998	69472
1999	72095
2000	91101
2001	94957
2002	110289
2003	117600
2004	123127
2005	124262
2006	122198
2007	128844
2008	141157
2009	148936
2010	154694
2011	156539
2012	145323
2013	131677
2014	119592
2015	135951
2016	125836
2017	116725
2018	113613
2019	111039
2020	108193