Year	Number of
1990	2233.81
1991	2349.89
1992	2474.48
1993	2608.45
1994	2754.45
1995	2916.1
1996	3052.44
1997	3203.48
1998	3367.94
1999	3540.66
2000	3721.61
2001	3905.99
2002	4098.95
2003	4302.93
2004	4519.02
2005	4751.04
2006	4959.67
2007	5177.5
2008	5409.04
2009	5653.41
2010	5912.58
2011	6157.25
2012	6418.46
2013	6690.72
2014	6973.45
2015	7265.71
2016	7557.54