Year	Number of
1990	3708.88
1991	3802.22
1992	3943.78
1993	4086.46
1994	4186.53
1995	4295.79
1996	4317.64
1997	4426.5
1998	4515.8
1999	4515.65
2000	4501.29
2001	4518.19
2002	4635.84
2003	4728.38
2004	4728.25
2005	4855.55
2006	4767.66
2007	4702.04
2008	4849.21
2009	4876.9
2010	4905.26
2011	4895.49
2012	4940.44
2013	5102.42
2014	5174.65
2015	5247.84
2016	5451.17