Year	Number of
1990	1339.98
1991	1421.54
1992	1510.57
1993	1607.02
1994	1710.12
1995	1820.06
1996	1861.21
1997	1903.5
1998	1946.66
1999	1990.81
2000	2036.38
2001	2079.92
2002	2124.38
2003	2173.63
2004	2223.56
2005	2273.57
2006	2344.5
2007	2418.26
2008	2498.71
2009	2584.03
2010	2674.86
2011	2746.03
2012	2821.68
2013	2897.79
2014	2977.07
2015	3059.3
2016	3140.38