Year	Number of
1990	731.08
1991	745.24
1992	766.15
1993	791.97
1994	787.84
1995	797.78
1996	796.5
1997	810.6
1998	819.88
1999	822.99
2000	821.81
2001	823.46
2002	824.47
2003	850.52
2004	849.05
2005	845.33
2006	845.4
2007	828.84
2008	812.04
2009	794.43
2010	788.77
2011	770.69
2012	770.9
2013	762.9
2014	740.03
2015	759.87
2016	742.44