Year	Number of
1990	1615.59
1991	1671.05
1992	1724.48
1993	1782.15
1994	1843.48
1995	1909.64
1996	1970.27
1997	2027.21
1998	2107.74
1999	2172.87
2000	2224.03
2001	2292.74
2002	2375.09
2003	2467.73
2004	2562.17
2005	2653.36
2006	2755.23
2007	2876.67
2008	2976.8
2009	3101.14
2010	3231.16
2011	3326.56
2012	3412.52
2013	3509.4
2014	3592.17
2015	3655.09
2016	3729.2