Year	Number of
1990	2268.64
1991	2324.48
1992	2383.59
1993	2444.63
1994	2505.59
1995	2571.81
1996	2636.85
1997	2702.1
1998	2768.1
1999	2830.15
2000	2900.2
2001	2956.34
2002	3016.14
2003	3084.38
2004	3153.58
2005	3231.28
2006	3320.89
2007	3410.56
2008	3506.25
2009	3599.88
2010	3701.57
2011	3763.48
2012	3818.2
2013	3872.38
2014	3928.26
2015	3986.2
2016	4049.46