Year	Number of
1990	10785.54
1991	11175.96
1992	11579.1
1993	12012.82
1994	12400.9
1995	12810.43
1996	13233.04
1997	13729.4
1998	14267.96
1999	14836.58
2000	15374.2
2001	15817.43
2002	16203.92
2003	16595.55
2004	16974.34
2005	17382.95
2006	17697.35
2007	18081.71
2008	18401.15
2009	18877.76
2010	19340.44
2011	19828.94
2012	20393.74
2013	21012.05
2014	21684.46
2015	22422.62
2016	23210.31