Year	Number of
1990	4811.89
1991	4731.11
1992	4643.99
1993	4563.57
1994	4446.77
1995	4376.31
1996	4272.91
1997	4202.13
1998	4112.3
1999	4001.69
2000	3874.52
2001	3833.15
2002	3779.63
2003	3702.42
2004	3592.69
2005	3507.5
2006	3408.56
2007	3347.8
2008	3281.33
2009	3193.88
2010	3168.78
2011	3147.56
2012	3165.69
2013	3166.18
2014	3151.56
2015	3140.52
2016	3162.59