Year	%
1997	14.58
2000	10.41
2001	10.41
2002	7.6
2003	7.27
2004	6.05
2005	5.54
2006	5.49
2007	5.39
2008	5.41
2009	5.07
2010	5.07
2011	5.07
2012	4.74
2013	4.74
2014	4.71
2015	4.68
2016	4.68
2017	4.73
2018	4.73
2019	4.73
2020	4.73
2021	4.74