Year	Number of
1990	54667.68
1991	56620.08
1992	58764.52
1993	61117.46
1994	63348.81
1995	65686.44
1996	66676.19
1997	67614.94
1998	68901.16
1999	70278.99
2000	71672.86
2001	72527.46
2002	73643.18
2003	74433.86
2004	75065.39
2005	75672.14
2006	75545.72
2007	75738.06
2008	76002.77
2009	76145.25
2010	76410.1
2011	77422.32
2012	78682.03
2013	80124.51
2014	81607.45
2015	83775.17
2016	85860.66