Year	Number of
1990	292.49
1991	297.14
1992	296.83
1993	315.51
1994	322.92
1995	308.1
1996	270.56
1997	264.42
1998	274.24
1999	254.87
2000	247.22
2001	249.82
2002	243.45
2003	236.29
2004	236.91
2005	228.71
2006	234.55
2007	238.3
2008	218.95
2009	213.31
2010	202.14
2011	204.99
2012	210.45
2013	194.97
2014	206.2
2015	205.1
2016	206.39