Year	Number of
1990	447.59
1991	447.84
1992	466.86
1993	477.67
1994	491.33
1995	517.11
1996	525.52
1997	541.73
1998	560.83
1999	586.59
2000	620.55
2001	647.75
2002	671.25
2003	686.7
2004	698.27
2005	715.08
2006	722.69
2007	730.5
2008	747.36
2009	761.73
2010	782.68
2011	791.84
2012	808.89
2013	821.56
2014	828.18
2015	843.87
2016	869.8