Year	Number of
1990	3225.97
1991	3246.67
1992	3264.07
1993	3344.79
1994	3417.96
1995	3504.48
1996	3332.99
1997	3377.23
1998	3410.65
1999	3451.03
2000	3487.81
2001	3528.03
2002	3554.58
2003	3584.27
2004	3611.17
2005	3632.73
2006	3642.02
2007	3643.67
2008	3631.1
2009	3648.28
2010	3654.71
2011	3647.06
2012	3645.71
2013	3663.72
2014	3687.55
2015	3720.8
2016	3753.94