Year	Number of
1990	7852.6
1991	7657.74
1992	7902.95
1993	8990.9
1994	9559.74
1995	8967.7
1996	8241.55
1997	7673
1998	7463.18
1999	7827.32
2000	7905.56
2001	7839.93
2002	7848.7
2003	7886.19
2004	7720.35
2005	7738.79
2006	7284.65
2007	7141.36
2008	7219.28
2009	6975.71
2010	7010.98
2011	6881.27
2012	6717.55
2013	6683.37
2014	6710.95
2015	6743.86
2016	6916.47