Year	Number of
1990	494.9
1991	520.4
1992	554.96
1993	585.34
1994	604.11
1995	623.38
1996	651.56
1997	672.68
1998	713.63
1999	721.47
2000	760.48
2001	730.23
2002	774.83
2003	809.17
2004	830.69
2005	842.8
2006	856.9
2007	872.2
2008	889.98
2009	911.25
2010	927.21
2011	955.96
2012	983.68
2013	999.48
2014	1027.15
2015	1056.96
2016	1091.27