Year	Number
1996	-1.52943170070648
1998	-1.49268007278442
2000	-1.57025909423828
2002	-1.34773349761963
2003	-1.17916703224182
2004	-1.09119367599487
2005	-1.10149943828583
2006	-1.14218163490295
2007	-1.0905464887619
2008	-0.977361500263214
2009	-0.805877387523651
2010	-0.760722637176514
2011	-0.730839669704437
2012	-0.710573136806488
2013	-0.720584511756897
2014	-0.822831988334656
2015	-0.928697109222412
2016	-0.948930025100708
2017	-0.95210599899292
2018	-0.918371915817261
2019	-0.916900396347046
2020	-0.904623210430145
2021	-0.980271220207214
2022	-1.05557787418365