Year	%
1994	19.82
1995	19.3
2001	19.17
2002	19.17
2003	19.36
2004	19.36
2005	19.08
2006	19.36
2007	19.18
2008	19.15
2009	18.42
2010	19.15
2011	18.15
2012	18.15
2013	19.73
2014	20.21
2019	20.08