Year	Number of
1990	887.3
1991	876.3
1992	865.66
1993	855.59
1994	846.63
1995	838.91
1996	842.92
1997	847.87
1998	854.54
1999	863.05
2000	874.36
2001	861.46
2002	846.3
2003	830.8
2004	816.19
2005	802.78
2006	803.5
2007	803.78
2008	803.28
2009	802.28
2010	802.24
2011	821.57
2012	841.58
2013	860.66
2014	880.73
2015	902.8
2016	925.84