Year	Number of
1990	1077.44
1991	1047.52
1992	1006.09
1993	982.14
1994	943.26
1995	908.33
1996	871.27
1997	822.22
1998	820.8
1999	807.08
2000	789.12
2001	797.09
2002	797.59
2003	771.07
2004	762.19
2005	752.1
2006	740.81
2007	735.68
2008	739.45
2009	739.65
2010	731.37
2011	737.74
2012	750.88
2013	741.61
2014	732
2015	747.41
2016	760.88