Year	Number
1996	-0.968231022357941
1998	-0.922067761421204
2000	-0.87523353099823
2002	-1.17875528335571
2003	-1.23015999794006
2004	-1.29281771183014
2005	-0.792749345302582
2006	-0.947573065757751
2007	-0.894971668720245
2008	-0.815719306468964
2009	-0.760188281536102
2010	-0.74347710609436
2011	-0.699536263942719
2012	-0.723069429397583
2013	-0.681769371032715
2014	-0.837622761726379
2015	-0.887996912002563
2016	-0.94233363866806
2017	-0.919125556945801
2018	-0.878198742866516
2019	-0.940476417541504
2020	-1.02443432807922
2021	-0.944378197193146
2022	-1.15594470500946