Year	Number of
1990	184.12
1991	200.87
1992	219.21
1993	240.27
1994	263.88
1995	290.64
1996	318.16
1997	348.86
1998	385.85
1999	426.47
2000	471.06
2001	507.23
2002	546.23
2003	592.62
2004	642.43
2005	695.95
2006	734.8
2007	775.59
2008	820.61
2009	867.79
2010	917.56
2011	965.84
2012	1016.67
2013	1068.74
2014	1124.54
2015	1184.49
2016	1246.76