Year	Number of
1990	1812.74
1991	1888.25
1992	1991.11
1993	2062.16
1994	2144.6
1995	2228.41
1996	2318.64
1997	2430.4
1998	2624.65
1999	2707.85
2000	2763.51
2001	2806.84
2002	2859.23
2003	2937.15
2004	3066.44
2005	3216.36
2006	3254.09
2007	3267.33
2008	3262.31
2009	3266.15
2010	3279.71
2011	3286.23
2012	3345.04
2013	3441.31
2014	3521.11
2015	3624.33
2016	3723.54