Year	Number of
1990	793.1
1991	802.34
1992	815.37
1993	824.93
1994	822.8
1995	823.7
1996	827.67
1997	825.54
1998	819.73
1999	808
2000	805.85
2001	806.15
2002	804.38
2003	788.21
2004	771.45
2005	757.55
2006	744.2
2007	735.03
2008	722.12
2009	722.45
2010	725.02
2011	723.05
2012	723.53
2013	723.74
2014	717.1
2015	718.66
2016	726.78