Year	Number of
1990	515.91
1991	524.71
1992	533.97
1993	544.31
1994	555.91
1995	568.95
1996	579.46
1997	590.94
1998	601.83
1999	612.16
2000	621.66
2001	622.53
2002	622.73
2003	625.72
2004	628.88
2005	632.55
2006	642.05
2007	651.95
2008	664.3
2009	677.33
2010	691.07
2011	704.75
2012	719.24
2013	732.1
2014	746.09
2015	761.32
2016	774.62