Year	Number
1996	1.21020126342773
1998	1.20902180671692
2000	1.23099732398987
2002	1.20913541316986
2003	1.22844505310059
2004	1.09269785881042
2005	0.847438395023346
2006	0.810431301593781
2007	0.826464056968689
2008	0.847226142883301
2009	0.85692697763443
2010	1.11120820045471
2011	1.09095239639282
2012	1.09636723995209
2013	1.10133159160614
2014	0.019607974216342
2015	0.830110430717468
2016	0.811983704566956
2017	0.814451456069946
2018	0.816888570785522
2019	0.78440934419632
2020	0.622582137584686
2021	0.635673701763153
2022	0.692453920841217