Year	%
2000	2.08103785101688
2001	2.0090884708922
2002	1.8086152004324
2003	1.76028405455979
2004	1.6869723194497
2005	1.41472525641496
2006	1.28109487068398
2007	1.20469815135573
2008	1.14686014644295
2009	1.15635392241263
2010	1.09911474551065
2011	0.958847108086342
2012	0.956152414825151
2013	0.913769100793535
2014	0.92956848575233
2015	0.76794097498
2016	0.770250267194197
2017	0.72472992864749
2018	0.729230546868364
2019	0.73548833198656
2020	0.581299920129497