Year	Number of
1990	2205.31
1991	2326.48
1992	2455.91
1993	2592.62
1994	2741.3
1995	2905.02
1996	2970.88
1997	3038.19
1998	3107.8
1999	3189.37
2000	3288.58
2001	3349.87
2002	3427.6
2003	3523.54
2004	3623.09
2005	3722.51
2006	3712.84
2007	3702.44
2008	3695.57
2009	3702.82
2010	3727.63
2011	3735.84
2012	3756.97
2013	3779.64
2014	3794.73
2015	3799.95
2016	3800.1