Year	Number of
1990	532.24
1991	547.9
1992	565.36
1993	584.03
1994	604.23
1995	626.65
1996	630.84
1997	636.83
1998	643.76
1999	651.78
2000	661.71
2001	657.17
2002	654.69
2003	653.41
2004	653.37
2005	655.09
2006	662.34
2007	670.2
2008	679.83
2009	690.52
2010	702.86
2011	720.48
2012	740.16
2013	760.78
2014	782.6
2015	805.57
2016	830.69