Year	Number of
1990	2617.2
1991	2682.13
1992	2751.55
1993	2827.84
1994	2908.8
1995	2995.42
1996	3078.18
1997	3163.83
1998	3257.95
1999	3354.88
2000	3455.23
2001	3525.06
2002	3606.63
2003	3702.84
2004	3811.61
2005	3935.53
2006	4057.13
2007	4179.59
2008	4308.73
2009	4444.2
2010	4589.47
2011	4765.1
2012	4953.76
2013	5155.08
2014	5370.24
2015	5599.91
2016	5854.37