Year	Number of
1990	8428.24
1991	8252.92
1992	8043.68
1993	7826.22
1994	7650.14
1995	7379.45
1996	7088.24
1997	6850.23
1998	6705.31
1999	6495.98
2000	6195.58
2001	5974.79
2002	5801.09
2003	5662.83
2004	5528.2
2005	5456.34
2006	5379.11
2007	5332.51
2008	5309.47
2009	5296.65
2010	5265.93
2011	5245.77
2012	5217.35
2013	5206.75
2014	5163.16
2015	5162.22
2016	5168.43