Year	Number of
1990	9971.1
1991	10170.64
1992	10311.39
1993	10465.36
1994	10502.55
1995	10610.13
1996	10572.57
1997	10393.18
1998	10451.91
1999	10457.24
2000	10399.97
2001	10402.86
2002	10417.13
2003	10531.98
2004	10519.14
2005	10574.18
2006	10609.11
2007	10710.74
2008	10816.2
2009	10874.23
2010	10849.48
2011	10863.2
2012	10995.28
2013	11055.55
2014	11108.2
2015	11341.61
2016	11580.35