Year	Number
1996	0.00496884016320109
1998	0.167925506830215
2000	0.0159793049097061
2002	-0.0900735929608345
2003	-0.152667000889778
2004	-0.265374273061752
2005	-0.693852126598358
2006	-0.88841587305069
2007	-0.986018240451813
2008	-0.864422380924225
2009	-0.873411774635315
2010	-0.797301411628723
2011	-0.76334536075592
2012	-0.832377791404724
2013	-0.786389470100403
2014	-0.886673927307129
2015	-0.919425427913666
2016	-1.01973187923431
2017	-0.995413899421692
2018	-1.00710666179657
2019	-1.00195634365082
2020	-1.03529012203217
2021	-1.16856575012207
2022	-1.21053624153137