Year	Number of
1990	2377.27
1991	2417.13
1992	2456.03
1993	2498.13
1994	2548.2
1995	2606.12
1996	2621.13
1997	2639.07
1998	2658.74
1999	2684.97
2000	2714.62
2001	2733.7
2002	2748.39
2003	2757.3
2004	2778.38
2005	2806.41
2006	2812.39
2007	2816.41
2008	2819.34
2009	2825.95
2010	2835.51
2011	2889.61
2012	2944.54
2013	2999.35
2014	3061.96
2015	3129.61
2016	3198.33