Year	%
2000	1.6998090742411
2001	1.77140149152656
2002	1.52712829936146
2003	1.47130923237118
2004	1.68704019143905
2005	1.44094706234274
2006	1.25020041702392
2007	1.3386468446989
2008	1.4022431003313
2009	1.4453041096501
2010	1.29291859424016
2011	1.55532348697173
2012	1.28363393448326
2013	1.31273373532075
2014	1.30467018069661
2015	1.31361288994532
2016	1.30552205270511
2017	1.06318138683893
2018	1.08831860524055
2019	1.05989610729539
2020	1.06593384493432