Year	Number of
1990	10184.27
1991	10103.21
1992	9970.02
1993	9977.75
1994	9887.73
1995	9833.24
1996	9593.1
1997	9356.96
1998	9355.56
1999	9338.35
2000	9246.07
2001	9180.49
2002	9159.95
2003	9103.07
2004	9011.96
2005	8939.17
2006	8852.09
2007	8818.38
2008	8834.77
2009	8794.41
2010	8825.89
2011	8892.41
2012	9029.56
2013	9208.84
2014	9388.85
2015	9674.62
2016	9952.59