Year	%
1996	14.03
1997	14.65
1999	14.47
2000	15.2
2001	14.64
2002	14.72
2003	15.15
2004	15.17
2005	15.33
2006	14.33
2007	13.76
2008	13.76
2009	13.81
2010	14.05
2011	14.51
2012	14.34
2013	14.36
2014	14.36
2015	14.69
2016	14.73
2017	17.78
2018	17.59
2019	15.02
2020	15.02
2021	13.87