Year	%
1992	5.44
1997	4.92
2001	4.9
2002	6.53
2003	4.98
2004	4.88
2005	3.33
2006	3.48
2007	3.37
2008	2.62
2009	2.96
2012	2.25
2013	2.53
2014	2.47
2015	1.79
2016	1.35
2017	1.75
2018	1.75
2019	1.74
2020	1.73
2021	2.04