Year	%
1998	5.08
1999	4.97
2000	4.53
2001	4.43
2002	4.71
2003	5.09
2004	6.14
2005	6.01
2006	5.74
2007	6.35
2008	6.01
2009	6.19
2010	8.03
2011	7.07
2012	7.51
2013	8.18
2016	10.8