Year	%
2000	2.09
2006	1.28
2008	1.57
2009	1.46
2010	1.48
2011	1.67
2012	1.77
2013	1.52
2014	1.36
2015	1.46
2016	1.28
2017	1.23
2018	1.35
2019	1.32
2020	1.34
2021	1.83