Year	Number of
1990	5154.71
1991	5381.25
1992	5626.03
1993	5862.89
1994	6084.47
1995	6327.67
1996	6321.76
1997	6343.77
1998	6355.51
1999	6342.77
2000	6327.94
2001	6607.62
2002	6905.37
2003	7169.63
2004	7423.2
2005	7677.75
2006	7873.15
2007	8082.93
2008	8274.89
2009	8493.48
2010	8730.34
2011	8802.4
2012	8927
2013	9045.83
2014	9286.16
2015	9560.79
2016	9872.25