Year	%
1996	21.57
1999	17.87
2000	13.11
2001	12.61
2002	13.68
2003	13.71
2006	13.91
2007	14
2008	15.18
2009	15.11
2010	14.57
2011	14.2
2012	14.04
2013	14.03
2014	14.04
2015	14.05
2016	14.07
2017	26.64
2018	26.78
2019	27.87
2020	10.24