Year	Number of
1990	486.09
1991	521.2
1992	568.67
1993	626.21
1994	686.19
1995	740.55
1996	770.55
1997	792.24
1998	809.64
1999	829.35
2000	856.23
2001	889.49
2002	924.88
2003	964.86
2004	1007.15
2005	1048.05
2006	1080.37
2007	1106.22
2008	1133.11
2009	1159.73
2010	1193.63
2011	1231.17
2012	1275.94
2013	1327.6
2014	1384.11
2015	1443.07
2016	1506.9