Year	%
1997	17.08
2000	11.68
2001	11.63
2002	8.26
2003	8.05
2004	7.18
2005	6.18
2006	6.19
2007	5.48
2008	2.09
2009	5.51
2010	5.56
2011	1.9
2012	1.32
2013	1.35
2014	1.04
2015	1.03
2016	1.25
2017	0.98
2018	1.24
2019	1.24
2020	1.23
2021	1.39