Year	Number
1996	-1.20064342021942
1998	-1.20554029941559
2000	-1.01998329162598
2002	-1.2083934545517
2003	-1.18841135501862
2004	-1.20203280448914
2005	-1.2245956659317
2006	-1.18593215942383
2007	-1.13997316360474
2008	-0.899454832077026
2009	-0.647138357162476
2010	-0.733642399311066
2011	-0.698397278785706
2012	-0.926168859004974
2013	-0.929248154163361
2014	-0.636368691921234
2015	-0.753366649150848
2016	-0.662379205226898
2017	-0.63322377204895
2018	-0.617031216621399
2019	-0.600062251091003
2020	-0.616107642650604
2021	-0.26617369055748
2022	-0.329515904188156