Year	Number of
1990	5673.19
1991	6037.15
1992	6435.9
1993	6862.08
1994	7310.11
1995	7797.19
1996	8229.09
1997	8713.74
1998	9250.27
1999	9816.11
2000	10431.18
2001	11033.11
2002	11696.99
2003	12418.99
2004	13206.7
2005	14074.71
2006	15083.23
2007	16192.97
2008	17409.9
2009	18747.12
2010	20212.55
2011	20835.29
2012	21473.71
2013	22115.46
2014	22691.61
2015	23335
2016	24004.41