Year	%
1995	20.2
1998	20.32
2000	18.79
2001	19.16
2002	19.66
2003	19.4
2004	19.4
2005	19.29
2007	15.53
2008	15.13
2009	15.87
2010	16.44
2011	16.26
2012	14.23
2013	13.75
2015	15.88
2016	17.26
2019	15.27