Year	%
2000	2.14086468417512
2001	2.03809671962127
2002	1.90159147329136
2003	1.84901813260068
2004	1.52596396248757
2005	1.43308508194398
2006	1.15009006492505
2007	1.16348754693909
2008	1.15511788346895
2009	0.958765205140195
2010	0.895590561132242
2011	0.878855746487958
2012	0.844698144421414
2013	0.726318879690997
2014	0.699239636338879
2015	0.725330282298414
2016	0.746173693101889
2017	0.736818054562052
2018	0.766580779311703
2019	0.647047925786663
2020	0.624238936691713