Year	Number of
1990	5180.78
1991	5358.34
1992	5542.5
1993	5740.64
1994	5955.15
1995	6190.05
1996	6331.9
1997	6484.55
1998	6648.55
1999	6815.76
2000	6997.32
2001	7235.39
2002	7477.85
2003	7718.62
2004	7967.32
2005	8226.95
2006	8490.29
2007	8768.37
2008	9050.88
2009	9335.28
2010	9634.55
2011	9805.96
2012	9993.81
2013	10179.86
2014	10378.07
2015	10585.64
2016	10796.12