Year	%
1993	9.33
1994	12.39
1995	12.21
1996	12.02
1997	12.02
1998	12.11
1999	14.03
2000	12.13
2001	12.13
2002	12.2
2003	12.18
2004	12.19
2005	12.17
2006	12.17
2007	12.17
2008	11.95
2009	13.63
2010	13.59
2011	13.53
2012	13.54
2014	14.68
2015	16.88
2016	16.93
2017	16.96
2018	16.9
2019	28.15
2020	16.93
2021	16.45