Year	Number of
1990	415.6
1991	427.51
1992	449.2
1993	465.49
1994	484.26
1995	508.27
1996	510.55
1997	528.72
1998	543.14
1999	554.04
2000	571.12
2001	593.17
2002	601.4
2003	609.77
2004	623.54
2005	636.4
2006	659.79
2007	672.27
2008	687.17
2009	701.42
2010	714.36
2011	738.26
2012	764.24
2013	794.86
2014	825.22
2015	858.92
2016	892.68