Year	Number of
1990	540.09
1991	549.09
1992	552.82
1993	576.57
1994	584.34
1995	588.47
1996	586.24
1997	578.17
1998	586.35
1999	611.5
2000	613.1
2001	627.24
2002	638.23
2003	645.37
2004	659.98
2005	671
2006	680.97
2007	689.77
2008	697.78
2009	705.13
2010	712.1
2011	719.58
2012	728.08
2013	736.86
2014	744.39
2015	752.51
2016	757.43