Year	%
1993	17.89
1995	16.23
1997	13.1
1998	13.03
1999	12.98
2000	12.97
2001	11.79
2002	10.11
2003	9.44
2004	9.65
2005	9.06
2006	8.5
2007	8.43
2008	4.6
2009	4.62
2010	4.82
2011	3.22
2013	2.96
2014	2.89
2015	2.89
2017	1.45
2018	1.32
2019	1.34
2020	1.2
2021	1.14