Year	Number of
1990	7368.04
1991	7605.71
1992	8053.51
1993	8428.61
1994	8864.02
1995	9320.04
1996	9673.49
1997	10110.44
1998	10548.14
1999	10984.91
2000	11395.1
2001	11687.71
2002	12063.38
2003	12446.84
2004	12854.51
2005	13206.35
2006	13610.84
2007	13938.85
2008	14272.86
2009	14582.15
2010	14939.11
2011	15200.96
2012	15436.9
2013	15729.51
2014	16076.25
2015	16489.6
2016	16716.22