Year	Number of
1990	6123.21
1991	6138.32
1992	6106.16
1993	6137.81
1994	6053.33
1995	6006.76
1996	5849.77
1997	5684.01
1998	5649.54
1999	5546.39
2000	5517.62
2001	5517.18
2002	5494.12
2003	5347.88
2004	5288.12
2005	5253.74
2006	5188.03
2007	5214.99
2008	5270.19
2009	5283.93
2010	5267.84
2011	5255.92
2012	5295.25
2013	5256.64
2014	5174.64
2015	5266.36
2016	5342.28