Year	Number of
1990	4578.64
1991	4579.09
1992	4625.87
1993	4632.97
1994	4691.92
1995	4674.11
1996	4717.62
1997	4693.63
1998	4673.09
1999	4645.4
2000	4634.16
2001	4653.93
2002	4682.21
2003	4671.02
2004	4707.15
2005	4690.66
2006	4749.98
2007	4800.97
2008	4875.58
2009	4879.7
2010	4946.38
2011	5003.19
2012	5023.62
2013	5052.31
2014	5123.14
2015	5275.46
2016	5448.47