Year	Number of
1990	2154.75
1991	2202.59
1992	2299.58
1993	2392.94
1994	2524.26
1995	2620.47
1996	2661.58
1997	2736.7
1998	2831.41
1999	2836.18
2000	2811.47
2001	2731.58
2002	2678.15
2003	2744.58
2004	2756.95
2005	2783.23
2006	2810.77
2007	2867.73
2008	2916.68
2009	2986.81
2010	3024.14
2011	3090.4
2012	3170.74
2013	3307.33
2014	3411.61
2015	3512.33
2016	3598.25