Year	Number of
1990	472.76
1991	493.1
1992	517.05
1993	544.59
1994	567.31
1995	590.87
1996	607.15
1997	623.51
1998	642.33
1999	663.68
2000	685.31
2001	705.08
2002	725.05
2003	744.58
2004	764.17
2005	783.78
2006	800.34
2007	818.07
2008	836.89
2009	856.64
2010	876.99
2011	896.54
2012	918.12
2013	942.18
2014	967.7
2015	994.38
2016	1014.12