Year	Number of
1990	3944.75
1991	4049.2
1992	4164.88
1993	4292.8
1994	4431.34
1995	4592.44
1996	4677.04
1997	4765.4
1998	4861.77
1999	4956.03
2000	5063.05
2001	5146.29
2002	5225.08
2003	5301.38
2004	5376.34
2005	5454.66
2006	5464.11
2007	5477.52
2008	5494.56
2009	5514.75
2010	5542.14
2011	5569.99
2012	5586.8
2013	5615.21
2014	5644.99
2015	5676.09
2016	5709.55