Year	Number
1996	-0.533439755439758
1998	-0.396195322275162
2000	-0.230154827237129
2002	-0.387816607952118
2003	-0.309724420309067
2004	-0.433708816766739
2005	-0.446520090103149
2006	-0.341833859682083
2007	-0.307009160518646
2008	-0.283480763435364
2009	-0.289741963148117
2010	-0.252949893474579
2011	-0.280185431241989
2012	-0.30497083067894
2013	-0.255426079034805
2014	-0.352517306804657
2015	-0.114109590649605
2016	0.0138364434242249
2017	0.0649444386363029
2018	-0.0610174685716629
2019	-0.20735926926136
2020	-0.187733843922615
2021	-0.118603125214577
2022	-0.633902013301849