Year	%
1995	39.4
1998	36.78
1999	19.26
2000	19.69
2001	18.97
2002	15.87
2003	14.87
2004	9.35
2005	10.97
2006	10.65
2007	10.71
2008	7.47
2009	7.44
2010	7.6
2011	6.65
2012	6.64
2013	6.65
2014	6.74
2015	7.07
2016	7.69
2018	5.76
2019	5.22
2020	5.68
2021	5.55