Year	Number of
1990	5076.2
1991	5218.65
1992	5380.89
1993	5552.16
1994	5736.46
1995	5932.41
1996	6005.28
1997	6073.95
1998	6141.55
1999	6211.49
2000	6287.22
2001	6378.36
2002	6487.31
2003	6627.11
2004	6769.68
2005	6909.65
2006	7032.49
2007	7149.61
2008	7265.83
2009	7398.04
2010	7555.15
2011	7585.21
2012	7640.27
2013	7706.75
2014	7776.54
2015	7843.53
2016	7897.27