Year	Number of
1990	5825.83
1991	5913.7
1992	6345.49
1993	6568.51
1994	6853.97
1995	7175.51
1996	7258.08
1997	7270.49
1998	7031.8
1999	6771.66
2000	6826.41
2001	7119.9
2002	7256.36
2003	7317.68
2004	7296.59
2005	7351.7
2006	7413.81
2007	7575.11
2008	8039.8
2009	8226.3
2010	8361.04
2011	7910.21
2012	8007.95
2013	8003.19
2014	8214.29
2015	8112.35
2016	8057.88