Year	%
1997	7.09
2002	9.15
2003	8.18
2004	9.75
2005	9.65
2006	8.86
2007	7.23
2008	8.83
2009	6.88
2010	6.09
2011	8.55
2012	7.27
2013	8.47
2014	8.99
2015	10.03
2016	9.34