Year	%
1994	15.19
1999	19.2
2001	15.29
2002	14.73
2003	11.79
2004	11.69
2005	11.35
2006	10.21
2007	9.13
2008	5.03
2009	6.76
2010	5.02
2012	3.65
2013	3.54
2014	3.43
2015	3.14
2016	2.86
2017	2.69
2018	4.39
2019	1.66
2020	1.34
2021	1.17