Year	Number of
1990	441.18
1991	463.32
1992	484.26
1993	512.23
1994	537.07
1995	564.48
1996	591.73
1997	617.46
1998	634.52
1999	667.04
2000	706.56
2001	728.16
2002	755
2003	779.34
2004	803.76
2005	836.15
2006	860.13
2007	892.6
2008	918.27
2009	940.58
2010	975.43
2011	972.42
2012	976.15
2013	972.37
2014	967.56
2015	962.95
2016	967.11