Year	Number
1983	871
1984	810
1985	955
1986	1027
1987	1107
1988	1056
1989	886
1990	1060
1991	1076
1992	1248
1993	1186
1994	1619
1995	1938
1996	2059
1997	2359
1998	14539
1999	5998
2000	8244
2001	8840
2002	9018
2003	8995
2004	9878
2005	11607
2006	13618
2007	13606
2008	13489
2009	11708
2010	11569
2011	13312
2012	12817
2013	13690
2014	12350
2015	11973
2016	13859
2017	12975
2018	15672
2019	16186
2020	21133
2021	21542