Year	Number
1996	-0.782561779022217
1998	-0.899157166481018
2000	-0.878509700298309
2002	-0.72459751367569
2003	-0.744711637496948
2004	-0.677577555179596
2005	-0.500253260135651
2006	-0.47920623421669
2007	-0.42621174454689
2008	-0.537264764308929
2009	-0.680893421173096
2010	-0.676808714866638
2011	-0.648009061813354
2012	-0.831212103366852
2013	-0.792035818099976
2014	-0.750901997089386
2015	-0.704286694526672
2016	-0.67736828327179
2017	-0.666013300418854
2018	-0.711567580699921
2019	-0.705255508422852
2020	-0.80155736207962
2021	-0.888018608093262
2022	-0.879449665546417