Year	%
1991	57.57
1993	8.2
1996	8.27
1997	8.08
1998	7.71
1999	6.95
2000	6.87
2001	1.58
2002	1.53
2003	1.52
2004	1.55
2005	1.61
2006	1.32
2007	1.48
2008	2.63
2009	1.6
2010	1.37
2011	1.38
2012	1.3
2013	1.31
2014	1.43
2015	1.43
2016	1.33
2017	1.3
2018	1.31
2019	1.22
2020	1.24
2021	1.21