Year	%
2000	1.61639495125258
2001	1.5592002926376
2002	1.31710098142461
2003	1.27636069447159
2004	1.20452057519911
2005	1.14354358624295
2006	0.931790109826132
2007	0.899263774128309
2008	0.849699693902436
2009	0.799919800782739
2010	0.661462079719364
2011	0.627190886117101
2012	0.587792969008105
2013	0.564885518183237
2014	0.476364700172522
2015	0.44972869595177
2016	0.431857408538507
2017	0.416577772938879
2018	0.407383766499408
2019	0.406625986021448
2020	0.31580170363006