Year	Number of
1990	652.66
1991	680.68
1992	671.82
1993	669.89
1994	667.12
1995	675.8
1996	685.97
1997	698.96
1998	714.5
1999	714.72
2000	709.2
2001	703.88
2002	710.22
2003	714.21
2004	721.56
2005	730.33
2006	731.76
2007	724.85
2008	712.18
2009	712.4
2010	717.01
2011	718.3
2012	718.06
2013	722.87
2014	716.84
2015	718.44
2016	718.57