Year	Number of
1990	2420.3
1991	2662.08
1992	2922.37
1993	3209.68
1994	3532.63
1995	3900.81
1996	4155.4
1997	4444.59
1998	4773.91
1999	5125.57
2000	5496.59
2001	5853.22
2002	6227.2
2003	6660.04
2004	7121.22
2005	7614.63
2006	7959.8
2007	8326.71
2008	8755.35
2009	9210.78
2010	9685.17
2011	10074.51
2012	10476.49
2013	10923.23
2014	11374.9
2015	11832.68
2016	12295.09