Year	%
1996	3.95
2006	5.42
2007	5.4
2008	5.84
2009	5.54
2010	5.7
2011	5.66
2012	5.63
2013	5.93
2014	6.39
2015	7.02
2016	7.28
2017	7.09
2018	7.06
2019	7.87