Year	Number of
1990	1076.19
1991	1062.78
1992	998.2
1993	928.5
1994	836.51
1995	749.21
1996	717.55
1997	725.46
1998	720.13
1999	725.99
2000	731.31
2001	734.62
2002	749.87
2003	787.14
2004	813.49
2005	821.77
2006	827.64
2007	830.13
2008	890.39
2009	943.91
2010	992.93
2011	1037.81
2012	1080.58
2013	1058.27
2014	1061.12
2015	1028.35
2016	1020.38