Year	Number of
1990	385.6
1991	402.01
1992	420.81
1993	441.17
1994	460.85
1995	477.2
1996	499.45
1997	515.57
1998	527.97
1999	543.58
2000	560.21
2001	569.15
2002	584.86
2003	600.45
2004	616.63
2005	631.52
2006	644.81
2007	662.59
2008	687.26
2009	710.45
2010	733.8
2011	761.03
2012	783.55
2013	803.97
2014	827.08
2015	857.77
2016	887.39