Year	Number of
1990	4856.91
1991	5115.27
1992	5607.28
1993	6244.4
1994	6666.23
1995	6728.45
1996	6786.25
1997	6851.39
1998	7026.79
1999	7360.38
2000	7719.85
2001	8005.53
2002	8374.78
2003	8640.26
2004	8877.72
2005	9225.76
2006	9358.13
2007	9680.65
2008	10077.17
2009	10204.96
2010	10518.77
2011	10716.61
2012	10876.14
2013	11114.73
2014	11364.86
2015	11548.75
2016	11836.28