Year	Number of
1990	433.27
1991	443.86
1992	465.16
1993	489.2
1994	514.08
1995	545.27
1996	565.82
1997	592.96
1998	620.02
1999	627.32
2000	633.66
2001	642.35
2002	647.04
2003	661.06
2004	674.2
2005	694.67
2006	715.16
2007	731.95
2008	752.56
2009	777.6
2010	805.77
2011	834.25
2012	864.88
2013	899.83
2014	935.11
2015	970.15
2016	1003.46