Year	%
2000	1.14413198753314
2001	1.1206824190359
2002	1.09607404743484
2003	1.03178265018791
2004	1.04782210028034
2005	1.10563009095386
2006	1.02616463931139
2007	1.02602586618717
2008	0.948588834701441
2009	0.916809465985679
2010	0.838058258929482
2011	0.815212335079231
2012	0.774420841403596
2013	0.844878379030497
2014	0.942737530923076
2015	0.929084618482986
2016	0.873037051847599
2017	0.882747342537675
2018	0.927241443373771
2019	0.838356165620103
2020	0.844668639022595