Year	%
1991	14.95
1994	7.44
1995	8.4
1996	9.08
1997	8.89
1998	8.82
1999	11.57
2000	11.17
2001	10.24
2002	9.94
2003	9.84
2004	9.96
2005	8.48
2006	8.33
2007	8.46
2008	8.59
2009	8.59
2010	8.61
2011	8.62
2012	8.62
2013	8.71
2014	8.71
2015	8.71
2016	8.71
2017	8.7
2018	8.7
2019	8.7
2020	8.7
2021	8.7