Year	Number of
1990	9300.84
1991	9415.05
1992	9594.7
1993	9723.88
1994	9824.77
1995	9954
1996	10147.57
1997	10269.24
1998	10494.95
1999	10733.72
2000	10895.09
2001	10970.54
2002	11072.51
2003	11342.8
2004	11500.83
2005	11614.88
2006	11772.82
2007	11878.2
2008	11975.37
2009	12129.72
2010	12281.15
2011	12405.54
2012	12529.76
2013	12791.9
2014	12951.79
2015	13300.16
2016	13798.39