Year	Number of
1990	5358.71
1991	5566.32
1992	5734.27
1993	5869.54
1994	5905.28
1995	5927.29
1996	5997.73
1997	5998.25
1998	5979.79
1999	5951.77
2000	5950.58
2001	5943.18
2002	5934.04
2003	6003.19
2004	6050.82
2005	6037.32
2006	6064.11
2007	6096.79
2008	6075.96
2009	6027.1
2010	5932.15
2011	5786.68
2012	5670.83
2013	5523.23
2014	5457.95
2015	5395.53
2016	5341.61