Year	Number of
1990	9693.53
1991	9775.02
1992	9858.06
1993	9968.78
1994	10045.83
1995	10185.16
1996	10126.94
1997	10046.39
1998	10113.22
1999	10128.87
2000	10063.51
2001	10091.42
2002	10206.1
2003	10296.57
2004	10471.41
2005	10634.68
2006	10755.59
2007	10697.25
2008	10653.84
2009	10607.1
2010	10558.97
2011	10673.48
2012	10787.26
2013	10921.92
2014	11183.57
2015	11543.71
2016	11764.69