Year	Number of
1990	282.92
1991	298.24
1992	314.2
1993	330.86
1994	348.12
1995	366.42
1996	383.33
1997	401.06
1998	419.47
1999	438.34
2000	458.44
2001	480.76
2002	504.75
2003	530.1
2004	556.55
2005	584.82
2006	624.74
2007	667.04
2008	712.47
2009	761.32
2010	814.17
2011	836.57
2012	859.18
2013	882.08
2014	905.28
2015	928.78
2016	953.14