Year	Number of
1990	9916.88
1991	10020.05
1992	10164.37
1993	10371.04
1994	10521.32
1995	10680.88
1996	10701.09
1997	10661.96
1998	10736.31
1999	10879.07
2000	10961.47
2001	11058.34
2002	11055.27
2003	10969.85
2004	10897.29
2005	10746.98
2006	10562.23
2007	10585.44
2008	10809.18
2009	11045.38
2010	11301.51
2011	11456.08
2012	11651.91
2013	11853.27
2014	12076.32
2015	12412.43
2016	12682.19