Year	Number
1996	-0.336625128984451
1998	-0.544004201889038
2000	-0.539989590644836
2002	-0.297719180583954
2003	-0.309780240058899
2004	-0.427259683609009
2005	-0.505047976970673
2006	-0.508157312870026
2007	-0.203974649310112
2008	-0.0305009130388498
2009	-0.0451405122876167
2010	-0.191482901573181
2011	-0.282379418611526
2012	-0.143631592392921
2013	0.0919297859072685
2014	0.485986232757568
2015	0.341639041900635
2016	0.337447881698608
2017	0.373769819736481
2018	0.366642981767654
2019	0.110049679875374
2020	0.0885764509439468
2021	0.196294024586678
2022	0.114945493638515