Year	Number of
1990	289.11
1991	311.6
1992	341.31
1993	377.65
1994	416.02
1995	451.18
1996	475.77
1997	495.68
1998	512.68
1999	531.76
2000	553.95
2001	576.39
2002	597.82
2003	622.42
2004	647.98
2005	670.22
2006	689.79
2007	705.76
2008	724
2009	740.52
2010	760.49
2011	779
2012	802.13
2013	830.63
2014	860.66
2015	892.53
2016	927.44