Year	%
2000	2.65233145627231
2001	2.58579755403255
2002	2.26733067497949
2003	2.18631717848106
2004	1.86794475200406
2005	1.76025084535995
2006	1.66180499911901
2007	1.34034365230322
2008	1.32499491422633
2009	1.21429941736426
2010	0.952984526022005
2011	0.91104690238738
2012	0.829668811257567
2013	0.792144846890663
2014	0.578464749726835
2015	0.563038905428015
2016	0.510467470041659
2017	0.506977666032018
2018	0.50619085970671
2019	0.470863923975913
2020	0.345089245036867