Year	Number of
1990	3699
1992	4386
1993	11664
1994	15505
1995	21453
1996	5220
1997	8321
1998	7789
1999	6037
2000	6652
2001	2743
2002	2805
2003	4711
2004	4239
2005	3585
2006	3026
2007	3641
2008	2970
2009	2904
2010	2870
2011	3049
2012	3143
2013	2860
2014	2391
2015	2060
2016	2215
2017	2045
2018	1872
2019	1828
2020	1594