Year	Number of
1990	775.7
1991	775.31
1992	778.61
1993	765.28
1994	755.32
1995	752.57
1996	754.49
1997	750.22
1998	743.72
1999	731.43
2000	741.02
2001	743.71
2002	748.31
2003	750.1
2004	749.41
2005	743.82
2006	729.43
2007	718.98
2008	717.85
2009	707.03
2010	714.77
2011	726.16
2012	736.29
2013	740.18
2014	739.61
2015	751.78
2016	760.76