Year	%
1992	7.25
1997	3.55
2001	7.52
2002	9.47
2003	9.02
2004	4.82
2005	4.72
2006	4.53
2007	4.78
2008	6.65
2009	5.89
2012	2.78
2013	2.54
2014	2.48
2015	4.9
2016	5.49
2017	5.34
2018	5.36
2019	3.92
2020	3.78
2021	3.75