Year	%
2000	2.18609345861467
2001	2.10777360297034
2002	1.87213321612561
2003	1.76593960868916
2004	1.45268788757257
2005	1.41438300506674
2006	1.21050577588551
2007	1.20105935571236
2008	1.04602669324002
2009	1.03150517574244
2010	1.06337038485529
2011	0.799981841462764
2012	0.780397880830128
2013	0.708950383548311
2014	0.688079349855183
2015	0.68099173813411
2016	0.60973543773266
2017	0.607955088970325
2018	0.479378218015809
2019	0.435640580833113
2020	0.417377353656104