Year	Number
1996	-0.587721765041351
1998	-1.13270461559296
2000	-1.33518970012665
2002	-0.554964661598206
2003	-0.346790134906769
2004	-0.311112105846405
2005	-0.530995607376099
2006	-0.326508969068527
2007	-0.218499302864075
2008	-0.141638219356537
2009	-0.241323813796043
2010	-0.157845288515091
2011	-0.203812569379807
2012	-0.320652544498444
2013	-0.342591553926468
2014	-0.287112534046173
2015	-0.270913779735565
2016	-0.198110342025757
2017	-0.194167792797089
2018	-0.182075321674347
2019	-0.129995688796043
2020	-0.0922319889068604
2021	-0.0625185593962669
2022	-0.142346099019051