Year	Number of
1990	405.31
1991	421.19
1992	439.78
1993	460.68
1994	483.6
1995	508.67
1996	520.28
1997	534.12
1998	549.73
1999	566.54
2000	584.56
2001	588.29
2002	593.64
2003	600.15
2004	607.27
2005	615.25
2006	627.51
2007	640.53
2008	655.29
2009	671.67
2010	690.07
2011	708.97
2012	730.31
2013	752.94
2014	776.99
2015	802.3
2016	827.37