Year	Number of
1990	494.53
1991	505.46
1992	525.25
1993	535.05
1994	552.73
1995	566.01
1996	571.09
1997	589.31
1998	607.59
1999	628.46
2000	646.72
2001	648.96
2002	651.74
2003	672.75
2004	696.83
2005	718.19
2006	722.16
2007	718.9
2008	739.89
2009	744.05
2010	740.1
2011	747.64
2012	751.46
2013	754.67
2014	756.99
2015	768.85
2016	780.65