Year	%
1993	4.2
1999	4.11
2000	3.49
2001	3.17
2002	2.98
2003	2.8
2004	0.99
2005	0.97
2006	2.24
2007	1.07
2008	1.21
2009	3.44
2011	2.35
2012	0.96
2013	0.77
2014	0.86
2015	2.31
2016	2.25
2017	0.98
2021	1.95