Year	Number of
1990	3577.86
1991	3693.36
1992	3817.13
1993	3949.65
1994	4089.55
1995	4237.01
1996	4367.58
1997	4505.06
1998	4654.11
1999	4810.21
2000	4973.92
2001	5107.9
2002	5244.23
2003	5392.32
2004	5548.78
2005	5716.38
2006	5863.29
2007	6019.08
2008	6186.3
2009	6367.39
2010	6564.45
2011	6743.34
2012	6932.52
2013	7121.15
2014	7325.1
2015	7545.71
2016	7784.88