Year	Number of
1990	497.47
1991	520.5
1992	543.73
1993	566.65
1994	594.6
1995	625.93
1996	652.13
1997	678.8
1998	704.16
1999	733.47
2000	764
2001	795.53
2002	826.82
2003	858.33
2004	890.36
2005	922.79
2006	955.48
2007	987.74
2008	1021.75
2009	1056.74
2010	1092.41
2011	1128.56
2012	1163.13
2013	1198.74
2014	1233.49
2015	1266.73
2016	1301.65