Year	%
1992	5.44
1997	4.92
2001	4.9
2002	6.53
2003	4.98
2004	4.88
2005	4.72
2006	4.9
2007	4.65
2008	4.47
2009	4.48
2012	4.36
2013	4.55
2014	4.55
2015	4.3
2016	4.25
2017	4.37
2018	4.37
2019	4.38
2020	4.38
2021	4.3