Year	Number
1996	-0.522590637207031
1998	-0.576960265636444
2000	-0.676537394523621
2002	-0.705224692821503
2003	-0.640382707118988
2004	-0.680870890617371
2005	-0.685749292373657
2006	-0.584695756435394
2007	-0.625862598419189
2008	-0.682735621929169
2009	-0.809174060821533
2010	-0.855494201183319
2011	-0.808169066905975
2012	-0.716865837574005
2013	-0.535113275051117
2014	-0.38400799036026
2015	-0.530484795570374
2016	-0.394856959581375
2017	-0.430010110139847
2018	-0.365889728069305
2019	-0.321246087551117
2020	-0.173210471868515
2021	-0.115318849682808
2022	-0.0921753123402596