Year	Number of
1990	5949.35
1991	6372.17
1992	6787.66
1993	7213.43
1994	7661.92
1995	8109.9
1996	8468.3
1997	8637.31
1998	8780.01
1999	8903.85
2000	9004.59
2001	9155.08
2002	9256.38
2003	9335.46
2004	9411.8
2005	9504.01
2006	9498.62
2007	9520.45
2008	9592.65
2009	9680.12
2010	9796.65
2011	9925.21
2012	10154.86
2013	10517.1
2014	11029.18
2015	11549.28
2016	12092.7