Year	Number of
1990	7044.86
1991	6921.68
1992	6805.42
1993	6714.8
1994	6563.84
1995	6442.24
1996	6309.1
1997	6156.72
1998	6030.76
1999	5881.6
2000	5719.77
2001	5583.8
2002	5497.14
2003	5392.66
2004	5257.8
2005	5134.93
2006	4981.09
2007	4896.77
2008	4819.43
2009	4753.48
2010	4727.41
2011	4724.15
2012	4762.72
2013	4784.66
2014	4847.5
2015	4934.01
2016	5057.67