Year	Number
1996	-0.189457833766937
1998	0.110229097306728
2000	0.227821603417397
2002	0.00242432416416705
2003	0.141017645597458
2004	-0.65463250875473
2005	-0.240614011883736
2006	-0.522423803806305
2007	-0.467305243015289
2008	-0.336524426937103
2009	-0.49253523349762
2010	-0.226726979017258
2011	-0.464799642562866
2012	-0.480688244104385
2013	-0.431784123182297
2014	-0.285844653844833
2015	-0.634387195110321
2016	-0.472771108150482
2017	-0.649576365947723
2018	-0.660840630531311
2019	-0.623455822467804
2020	-0.650508463382721
2021	-0.591131269931793
2022	-0.362989008426666