Year	Number of
1990	40639.32
1991	43216.1
1992	46043.44
1993	48782.44
1994	52120.44
1995	55942.48
1996	55635.78
1997	55407.55
1998	55215.33
1999	55016.9
2000	54850.83
2001	56291.22
2002	57692.1
2003	59339.46
2004	60869.01
2005	62529.69
2006	62341.16
2007	62162.49
2008	62002.57
2009	61920.97
2010	61936.22
2011	62125.99
2012	62346.42
2013	62621.15
2014	62944.7
2015	63787.12
2016	64797.02