Year	Number of
1980	1300
1981	3723
1982	3082
1983	2773
1984	2705
1985	2604
1986	2617
1987	2983
1988	2737
1989	3106
1990	2944
1991	2797
1992	2885
1993	2798
1994	2750
1995	2842
1996	3003
1997	2806
1998	2604
1999	2558
2000	2402
2001	2447
2002	2092
2003	2283
2004	2220
2005	1907
2006	1997
2007	2303
2008	2336
2009	2283
2010	2448
2011	2693
2012	2790
2013	2742
2014	2632
2015	2465
2016	2339
2017	2255
2018	2109
2019	2248
2020	1886