Year	%
1995	19.3
1998	19.29
2000	19.04
2001	19.17
2002	19.17
2003	19.36
2004	19.36
2005	19.08
2007	19.18
2008	19.13
2009	19.13
2010	19.15
2011	19.15
2012	18.78
2013	18.78
2015	18.78
2016	18.78
2019	18.8