Year	Number of
1990	5180.18
1991	5243.37
1992	5319.72
1993	5401.98
1994	5487.26
1995	5550.76
1996	5587
1997	5563.8
1998	5550.38
1999	5505.61
2000	5367.28
2001	5248.76
2002	5172.85
2003	5064.48
2004	4951.14
2005	4817.53
2006	4698.14
2007	4577.73
2008	4503.54
2009	4455.05
2010	4416.76
2011	4319
2012	4316.08
2013	4373.27
2014	4502.47
2015	4652.78
2016	4810.76