Year	Number
1996	-0.613846182823181
1998	-0.636419594287872
2000	-0.638975918292999
2002	-0.826058447360992
2003	-0.651164174079895
2004	-0.554222404956818
2005	-0.488400876522064
2006	-0.403454512357712
2007	-0.394356846809387
2008	-0.211421355605125
2009	-0.146806985139847
2010	-0.0929768234491348
2011	-0.106993712484837
2012	-0.0511750727891922
2013	-0.0562596283853054
2014	-0.0324693247675896
2015	-0.265548706054688
2016	-0.297492891550064
2017	-0.32818403840065
2018	-0.392472922801971
2019	-0.456622540950775
2020	-0.493940472602844
2021	-0.374614268541336
2022	-0.323431134223938