Year	Number of
1990	2662.18
1991	2607.61
1992	2743.35
1993	2772.11
1994	2806.01
1995	2868.19
1996	2871.99
1997	2843.71
1998	2717.36
1999	2622.9
2000	2613.89
2001	2704.25
2002	2730.71
2003	2692.3
2004	2622.69
2005	2579
2006	2525.94
2007	2511.75
2008	2579.86
2009	2544.58
2010	2508.37
2011	2330.48
2012	2325.3
2013	2288.94
2014	2333.11
2015	2286.68
2016	2270.88