Year	Number of
1990	5294.99
1991	5474.52
1992	5658.38
1993	5857.47
1994	5965.5
1995	6106.85
1996	6309.15
1997	6437.2
1998	6626.73
1999	6741.3
2000	6930.04
2001	7079.93
2002	7278.21
2003	7465.65
2004	7652.44
2005	7826.26
2006	8080.54
2007	8347.37
2008	8594.3
2009	8956.88
2010	9278.74
2011	9615
2012	9925.27
2013	10244.51
2014	10552.69
2015	10934.85
2016	11409.53