Year	%
2000	1.76778879750015
2001	1.61301096254896
2002	1.59852776986726
2003	1.60769484487695
2004	1.31985946386557
2005	1.38011347383816
2006	1.39997678980401
2007	1.43820506277834
2008	1.472418972785
2009	1.57593097790785
2010	1.65168441085313
2011	1.43100340475003
2012	1.38155230866506
2013	1.28594788533836
2014	1.08936144496229
2015	1.07141742627516
2016	0.88945048262316
2017	0.82624449897717
2018	0.791219249375441
2019	0.810878478302646
2020	0.784484407721085