Year	Number of
1990	2269.08
1991	2307.97
1992	2358.92
1993	2392.48
1994	2441.53
1995	2464.98
1996	2515.8
1997	2532.71
1998	2537.29
1999	2547.68
2000	2567.2
2001	2588.06
2002	2594.32
2003	2595.05
2004	2592.64
2005	2589.19
2006	2616.76
2007	2652.9
2008	2702.68
2009	2729.96
2010	2775.12
2011	2805.04
2012	2832.4
2013	2865.76
2014	2928.18
2015	3051.31
2016	3178.42