Year	Number of
1990	1461.41
1991	1537.93
1992	1617.24
1993	1697.6
1994	1770.17
1995	1857.72
1996	1948.66
1997	2006.21
1998	2073.76
1999	2170.65
2000	2269.46
2001	2346.55
2002	2425.4
2003	2505.64
2004	2595.71
2005	2677.12
2006	2765.43
2007	2862.08
2008	2960.2
2009	3036.79
2010	3115.13
2011	3105.16
2012	3103.43
2013	3096.03
2014	3100.98
2015	3079.22
2016	3016.86