Year	Number of
1990	67185.76
1991	68538.13
1992	69089.71
1993	69279.96
1994	69505.53
1995	69970.26
1996	70272.33
1997	70333.6
1998	70440.88
1999	70500.89
2000	70466.33
2001	70351.26
2002	70191.52
2003	70499.74
2004	71061.87
2005	71646.68
2006	72183.45
2007	73014.76
2008	73689.21
2009	73931.35
2010	74625.59
2011	75034.12
2012	75031.99
2013	75121.47
2014	75487.32
2015	76583.2
2016	77772.52