Year	%
1991	11.88
1993	11.52
1996	6.73
1997	6.84
1998	6.65
1999	6.15
2000	5.93
2001	5.76
2002	4.6
2003	4.71
2004	4.67
2005	3.9
2006	5.16
2007	5.35
2008	5.11
2009	5.07
2010	4.6
2011	3.2
2012	3.32
2013	3.4
2014	3.4
2015	3.22
2016	3.19
2017	3.19
2018	3.22
2019	3.02
2020	3
2021	3.09