Year	%
1992	11.31
1993	8.7
1996	5.57
1997	4.89
1998	4.03
1999	3.38
2000	2.65
2001	3.96
2002	3.82
2003	4.15
2004	4.21
2005	4.18
2006	4.09
2007	3.03
2008	2.25
2009	2.11
2010	4.02
2011	2.04
2012	2.07
2013	2.07
2014	2.06
2015	2.07
2016	2.07
2017	2.07
2019	2.04
2020	1.99
2021	1.99