Year	Number of
1990	9660.33
1991	9559.28
1992	9471.2
1993	9340.16
1994	9273.15
1995	9294.39
1996	9324.02
1997	9367.5
1998	9431.26
1999	9554.23
2000	9677.57
2001	9695.77
2002	9819.91
2003	9912.57
2004	10063.35
2005	10199.79
2006	10313.91
2007	10374.92
2008	10474.08
2009	10528.57
2010	10605.72
2011	10545.79
2012	10480.71
2013	10340.61
2014	10076.44
2015	9976.71
2016	9907.51