Year	Number
1996	-1.13282036781311
1998	-1.07885468006134
2000	-1.14988946914673
2002	-1.1135847568512
2003	-1.02652370929718
2004	-1.10595369338989
2005	-1.01496338844299
2006	-0.995142638683319
2007	-0.992244720458984
2008	-0.980641484260559
2009	-0.9315185546875
2010	-1.00106000900269
2011	-0.996684908866882
2012	-0.921265780925751
2013	-0.930915296077728
2014	-0.825429439544678
2015	-0.871415019035339
2016	-0.831907212734222
2017	-0.839265823364258
2018	-0.492077380418777
2019	-0.285695314407349
2020	-0.377906501293182
2021	-0.25915989279747
2022	-0.185301154851913