Year	Number of
1990	2678.7
1991	2796.43
1992	2919.09
1993	3045.91
1994	3182.13
1995	3332.98
1996	3454.88
1997	3589.04
1998	3733.61
1999	3887.03
2000	4051.53
2001	4148.52
2002	4249.56
2003	4355.93
2004	4466.6
2005	4588.59
2006	4724.89
2007	4860.76
2008	5000.98
2009	5143.35
2010	5296.67
2011	5479.38
2012	5671.06
2013	5856.51
2014	6053.6
2015	6265.16
2016	6489.54