Year	Number of
1990	589.59
1991	609.94
1992	632.95
1993	648.88
1994	678.16
1995	705.44
1996	738.4
1997	748.04
1998	766.97
1999	785.11
2000	810.5
2001	814.28
2002	809.19
2003	831.88
2004	829.88
2005	836.51
2006	860.6
2007	890.16
2008	932.19
2009	967.33
2010	1009.92
2011	1062.57
2012	1116.37
2013	1169.85
2014	1226.1
2015	1288.62
2016	1352.46