Year	Number
1996	-0.215465322136879
1998	-0.340585500001907
2000	-0.535638272762299
2002	-0.586018621921539
2003	-0.667013168334961
2004	-0.845721423625946
2005	-0.753487408161163
2006	-0.799711525440216
2007	-0.832707107067108
2008	-0.784430801868439
2009	-0.556257903575897
2010	-0.656645715236664
2011	-0.607601761817932
2012	-0.55792099237442
2013	-0.397459864616394
2014	-0.404897391796112
2015	-0.698470294475555
2016	-0.673570692539215
2017	-0.565548002719879
2018	-0.501230299472809
2019	-0.44062128663063
2020	-0.545202791690826
2021	-0.437882721424103
2022	-0.307013601064682