Year	Number
1996	-0.173729807138443
1998	-0.0557225905358791
2000	-0.130214244127274
2002	-0.346247434616089
2003	-0.340948224067688
2004	-0.387165576219559
2005	-0.49572366476059
2006	-0.613583862781525
2007	-0.620565354824066
2008	-0.586162805557251
2009	-0.623867869377136
2010	-0.605241239070892
2011	-0.678618311882019
2012	-0.62617301940918
2013	-0.608322560787201
2014	-0.528059959411621
2015	-0.530868947505951
2016	-0.430909156799316
2017	-0.399782121181488
2018	-0.540220737457275
2019	-0.611618995666504
2020	-0.536126554012299
2021	-0.522020161151886
2022	-0.527693390846252