Year	Number of
1990	3956.43
1991	3985.9
1992	4042.33
1993	4179.77
1994	4253.64
1995	4362.34
1996	4487.97
1997	4587.96
1998	4712.85
1999	4922.18
2000	5082.23
2001	5144.19
2002	5169.85
2003	5210.48
2004	5219.01
2005	5235
2006	5269.08
2007	5243.33
2008	5300.5
2009	5313.02
2010	5313.87
2011	5374.36
2012	5379.31
2013	5398.76
2014	5427.02
2015	5439.88
2016	5465.25