Year	%
1996	4.59
2000	4.31
2001	4.55
2003	4.68
2004	4.76
2005	4.78
2006	3.98
2007	4.35
2008	4.11
2009	4.78
2010	4.26
2011	4.64
2012	4.21
2013	8.36
2014	4.21
2015	4.97
2016	4.94
2020	1.99
2021	2.06