Year	Number of
1990	30500.99
1991	30986.33
1992	31383.97
1993	31747.47
1994	32111.86
1995	32459.58
1996	33016.85
1997	33630.91
1998	33957.55
1999	34177.8
2000	34393.5
2001	34535.17
2002	34720.3
2003	34854.87
2004	34958.04
2005	35454.69
2006	35718.33
2007	36083.7
2008	36473.74
2009	36873.5
2010	37447.34
2011	37875.37
2012	38332.64
2013	38640.77
2014	38779.72
2015	39192.38
2016	39594.67