Year	Number of
1990	4848.92
1991	4843.97
1992	4867.36
1993	4969.2
1994	5013.74
1995	5085.47
1996	5171.84
1997	5243.15
1998	5326.23
1999	5415.32
2000	5507.93
2001	5514.06
2002	5509.99
2003	5516.55
2004	5512.18
2005	5502.65
2006	5528.5
2007	5505.47
2008	5516.06
2009	5501.95
2010	5487.01
2011	5500.37
2012	5515.33
2013	5524.95
2014	5545.29
2015	5577.08
2016	5616.34