Year	%
1996	22.46
1999	21.5
2000	15.9
2001	17.36
2002	17.4
2003	17.18
2006	14.32
2007	13.06
2008	12.25
2009	15.88
2010	13.11
2011	12.88
2012	14.97
2013	14.95
2014	12.46
2015	12.51
2016	12.59
2017	22.85
2018	22.89
2019	22.86
2020	10.87