Year	Number of
1990	350.79
1991	370.31
1992	392.67
1993	418.63
1994	448.53
1995	490.9
1996	534.29
1997	583.71
1998	640.72
1999	705.65
2000	781.85
2001	847.16
2002	920.58
2003	1002.33
2004	1093.24
2005	1198.52
2006	1315.84
2007	1445.7
2008	1589.74
2009	1752.42
2010	1937.67
2011	2112.72
2012	2309.88
2013	2527.85
2014	2778
2015	3054.46
2016	3350.89