Year	%
1992	7.66
1993	9.86
1996	3.08
1997	2.96
1998	2.52
1999	2.18
2000	1.43
2001	5.36
2002	5.36
2003	5.92
2004	5.59
2005	7.48
2006	7.85
2007	1.34
2008	1
2009	1.27
2010	14.15
2011	0.98
2012	1.1
2013	1.11
2014	1.12
2015	1.35
2016	1.49
2017	1.46
2019	1.38
2020	1.64
2021	1.64