Year	Number of
1990	521.09
1991	525.55
1992	528.71
1993	568.58
1994	587.13
1995	604.96
1996	621.5
1997	634.98
1998	646.15
1999	657.56
2000	668.76
2001	676.44
2002	682.79
2003	690.44
2004	696.68
2005	702.46
2006	708.04
2007	713.55
2008	718.53
2009	729.49
2010	738.38
2011	747.49
2012	755.41
2013	772.63
2014	788.52
2015	804.74
2016	823.78