Year	Number of
1990	5167.76
1991	5137.68
1992	5065.72
1993	5030.3
1994	4964.84
1995	4935.34
1996	4898.17
1997	4837.34
1998	4803.4
1999	4768.99
2000	4744.82
2001	4703.41
2002	4718.76
2003	4721.12
2004	4719.18
2005	4694.79
2006	4685.26
2007	4703.58
2008	4721.28
2009	4761.61
2010	4772.13
2011	4723.03
2012	4678.33
2013	4604.99
2014	4472.68
2015	4380.7
2016	4418.88