Year	Number of
1990	292.23
1991	312.37
1992	334.23
1993	356.01
1994	378.61
1995	403.6
1996	421.97
1997	445.11
1998	467.93
1999	487.57
2000	509.23
2001	546.65
2002	586.78
2003	627.1
2004	668.88
2005	714.42
2006	737.19
2007	761.95
2008	786.05
2009	811.21
2010	837.86
2011	856.66
2012	880.15
2013	903.16
2014	929.29
2015	956.44
2016	984.61