Year	Number of
1990	5113.29
1991	5055.37
1992	4951.2
1993	4860.6
1994	4765.62
1995	4724.13
1996	4668.63
1997	4594.9
1998	4548.56
1999	4508.02
2000	4476.24
2001	4418.25
2002	4414.88
2003	4392.61
2004	4356.82
2005	4294.1
2006	4234.09
2007	4191.05
2008	4166.34
2009	4177.19
2010	4155.41
2011	4075.15
2012	4011.93
2013	3926.68
2014	3817.31
2015	3691.99
2016	3670.99