Year	Number of
1990	721.43
1991	740.17
1992	746.64
1993	763.84
1994	774.82
1995	768.47
1996	796.11
1997	802.95
1998	811.09
1999	817.51
2000	814.01
2001	821.5
2002	823.08
2003	816.34
2004	819.2
2005	824.54
2006	833.17
2007	856.52
2008	867.13
2009	873.81
2010	884.23
2011	893.59
2012	910.07
2013	910.81
2014	917.5
2015	929.33
2016	931.95