Year	%
1990	27.06
1993	23.2
1994	23.2
1997	18.64
1998	9.26
2000	8.08
2001	8.07
2003	7.68
2004	8.55
2005	9.85
2006	9.65
2007	9.52
2008	9.41
2009	9.47
2010	8.13
2011	8.02
2012	7.72
2014	7.32
2015	6.6
2017	6.92
2018	7.67
2019	7.67
2020	6.43
2021	4.12