Year	Number of
1990	324.13
1991	331.61
1992	340.21
1993	350.36
1994	360.28
1995	371.64
1996	382.37
1997	400.65
1998	417.79
1999	435.22
2000	452.26
2001	471.06
2002	490.38
2003	511.13
2004	531.77
2005	552.43
2006	572.74
2007	597.62
2008	622.12
2009	647.01
2010	670.05
2011	692.74
2012	715.88
2013	734.93
2014	756.76
2015	785.48
2016	816.29