Year	Number of
1990	606.65
1991	639.74
1992	674.78
1993	711.47
1994	750.4
1995	792
1996	826.91
1997	861.99
1998	895.16
1999	928.65
2000	962.99
2001	990.73
2002	1016.24
2003	1040.26
2004	1064.21
2005	1089.59
2006	1125.44
2007	1160.99
2008	1201.31
2009	1242.38
2010	1284.88
2011	1329.4
2012	1373.77
2013	1416.52
2014	1459.61
2015	1503.61
2016	1563.65