Year	Number
1996	-0.181069865822792
1998	-0.421954840421677
2000	-0.42108216881752
2002	-0.492929816246033
2003	-0.457673877477646
2004	-0.235716462135315
2005	-0.146773517131805
2006	-0.54314786195755
2007	-0.523537278175354
2008	-0.563192903995514
2009	-0.503894746303558
2010	-0.49994820356369
2011	-0.474874913692474
2012	-0.346539199352264
2013	-0.33967924118042
2014	-0.360291033983231
2015	-0.391466587781906
2016	-0.416951030492783
2017	-0.398867100477219
2018	-0.100061126053333
2019	-0.0478364825248718
2020	-0.155352875590324
2021	-0.165285885334015
2022	-0.00209344946779311