Year	%
1991	33.93
1993	4.6
1996	4.3
1997	4.24
1998	4.09
1999	3.9
2000	3.66
2001	1.06
2002	1.08
2003	1.08
2004	1.08
2005	1.08
2006	1.03
2007	1.13
2008	3.84
2009	1.12
2010	1.11
2011	1.12
2012	0.99
2013	0.99
2014	0.98
2015	0.98
2016	0.98
2017	0.99
2018	0.98
2019	0.98
2020	0.98
2021	0.98