Year	Number
1996	-0.775006890296936
1998	-0.106866508722305
2000	-0.207235515117645
2002	-0.550169944763184
2003	-0.559017360210419
2004	-0.54865700006485
2005	-0.921983242034912
2006	-0.869873523712158
2007	-0.747831761837006
2008	-0.61021226644516
2009	-0.7908074259758
2010	-0.808443784713745
2011	-0.754677414894104
2012	-0.590442359447479
2013	-0.520246863365173
2014	-0.339367091655731
2015	-0.416289240121841
2016	-0.504316508769989
2017	-0.691195011138916
2018	-0.656307816505432
2019	-0.705046415328979
2020	-0.653707087039948
2021	-0.576708912849426
2022	-0.609061777591705