Year	%
2000	5.90996510611625
2001	5.9292998618609
2002	5.97758884220494
2003	5.38874633293007
2004	5.3722916550701
2005	5.27705191865952
2006	4.65700050256137
2007	4.50105709628911
2008	3.97704610256725
2009	3.78402985990301
2010	3.3186113774456
2011	3.16852126816361
2012	2.68667458156325
2013	2.47694877107588
2014	2.07745053350506
2015	1.86134524588678
2016	1.66560209745588
2017	1.63105003108047
2018	1.46545859529132
2019	1.38328506270159
2020	1.16663017202715