Year	%
1992	36.41
1993	33.28
1994	30.72
1996	18.43
1997	14.85
1998	15.1
1999	14.03
2000	13.74
2001	13.04
2002	8.11
2003	6.67
2004	5.88
2005	5.35
2006	4.66
2007	6.38
2008	6.25
2009	4.9
2010	7.01
2011	10.13
2014	7.87
2015	7
2016	5.04
2017	5.61
2018	5.17
2019	3.87
2020	3.46
2021	3.24