Year	%
1996	19.24
1999	14.74
2000	14.99
2001	14.5
2002	14.6
2003	14.09
2006	13.27
2007	14.09
2008	12.42
2009	14.23
2010	13.25
2011	13.99
2012	13.49
2013	14.17
2015	13.36
2016	14.64
2017	14.48
2018	13.54
2019	17.44
2020	18.15
2021	18.24