Year	Number of
1990	7126.84
1991	7275.34
1992	7273.85
1993	7281.05
1994	7188.07
1995	7199.91
1996	6803.18
1997	6321.93
1998	5792.38
1999	5789.91
2000	5721.99
2001	5492.31
2002	5362.99
2003	5251.04
2004	5154.86
2005	5154.26
2006	4841.28
2007	4866.55
2008	4777.45
2009	4329.51
2010	4083.43
2011	3846.78
2012	3897.93
2013	3840.48
2014	3575.54
2015	3626.16
2016	3716.48