Year	Number of
1990	14127.41
1991	14827.55
1992	15633.02
1993	16359.36
1994	17075.56
1995	17977.42
1996	18690.81
1997	19376.83
1998	20073.07
1999	20702.04
2000	21190.91
2001	21654.3
2002	22094.75
2003	22582.64
2004	23144.88
2005	23724.55
2006	24132.48
2007	24658.09
2008	25154.92
2009	25418.55
2010	25937.1
2011	26411.62
2012	26640.41
2013	26719.38
2014	26469.1
2015	26687.84
2016	26952.88