Year	Number of
1990	414.88
1991	435.96
1992	461.14
1993	491.29
1994	522.65
1995	555.97
1996	581.94
1997	607.95
1998	632.38
1999	659.82
2000	688.52
2001	718.51
2002	749.95
2003	786.07
2004	824.63
2005	860
2006	884.04
2007	899.69
2008	913.9
2009	929.31
2010	948.13
2011	975.1
2012	1018.96
2013	1080.72
2014	1149.9
2015	1224.27
2016	1290.14