Year	Number
1996	-0.882711172103882
1998	-0.99400806427002
2000	-0.877741813659668
2002	-0.830886363983154
2003	-0.666397273540497
2004	-0.784367978572845
2005	-1.10994613170624
2006	-1.12030553817749
2007	-1.1966655254364
2008	-1.19674217700958
2009	-1.20939469337463
2010	-1.26566994190216
2011	-1.41113817691803
2012	-1.43404412269592
2013	-1.47103488445282
2014	-1.43136882781982
2015	-1.41282474994659
2016	-1.37062108516693
2017	-1.40643751621246
2018	-1.36438310146332
2019	-1.42314827442169
2020	-1.40684616565704
2021	-1.29527711868286
2022	-1.28706395626068