Year	Number of
1990	141.32
1991	151.08
1992	155.94
1993	167.43
1994	176.94
1995	177.76
1996	165.26
1997	165.94
1998	177.08
1999	171.48
2000	175.04
2001	184.85
2002	188.12
2003	186.24
2004	192.16
2005	195.02
2006	201.59
2007	209.59
2008	199.21
2009	200.08
2010	191.3
2011	193.62
2012	199.89
2013	187.4
2014	199.68
2015	197.65
2016	198.31