Year	Number of
1990	2220.42
1991	2226.29
1992	2273.97
1993	2335.14
1994	2357.18
1995	2416
1996	2435.9
1997	2457.39
1998	2491.36
1999	2532.2
2000	2500.25
2001	2535.54
2002	2603.27
2003	2681.31
2004	2704.22
2005	2795.31
2006	2798.88
2007	2814.31
2008	2916.43
2009	3046.43
2010	3047.01
2011	3051.54
2012	3120.84
2013	3260.08
2014	3353.41
2015	3342.13
2016	3391.66