Year	Number of
1990	396.74
1991	410.04
1992	428.1
1993	454.72
1994	490.33
1995	578.91
1996	623.52
1997	667.01
1998	687.74
1999	704.56
2000	718.46
2001	730.67
2002	738.12
2003	739.73
2004	721.26
2005	717.67
2006	728.86
2007	733.98
2008	726.32
2009	734.27
2010	736.12
2011	738.18
2012	748.88
2013	744.12
2014	734.57
2015	743.24
2016	756.27