Year	Number of
1990	379.55
1991	392.07
1992	405.68
1993	411.55
1994	434.45
1995	439.45
1996	451.17
1997	463.78
1998	481.69
1999	507.65
2000	522.29
2001	544.88
2002	561.52
2003	577.21
2004	605.23
2005	629.68
2006	652.2
2007	672.46
2008	696.35
2009	717.73
2010	739.86
2011	762.51
2012	786.27
2013	812.56
2014	837.24
2015	865.57
2016	892.12