Year	Number of
1990	1939.87
1991	2032.23
1992	2091.85
1993	2161.6
1994	2256.8
1995	2381.46
1996	2443.95
1997	2524.04
1998	2595.93
1999	2676.62
2000	2717.96
2001	2752.03
2002	2770.95
2003	2873.77
2004	2848.87
2005	2851.79
2006	2855.32
2007	2823.18
2008	2785.47
2009	2972.43
2010	3032.12
2011	3096.32
2012	3164.47
2013	3295.87
2014	3413.88
2015	3550.62
2016	3694.22