Year	Number of
1990	516.73
1991	530.46
1992	546.78
1993	563.7
1994	579.65
1995	596.28
1996	603.61
1997	607.09
1998	608.68
1999	611.79
2000	615.73
2001	619.62
2002	625.51
2003	632.11
2004	639.75
2005	649.32
2006	655.57
2007	662.88
2008	672.29
2009	683.17
2010	694.53
2011	701.27
2012	711.55
2013	721.05
2014	730.83
2015	742.29
2016	754.98