Year	Number
1996	-1.19630861282349
1998	-1.04671502113342
2000	-0.859866619110107
2002	-0.731832385063171
2003	-0.601958394050598
2004	-0.621019124984741
2005	-0.580545425415039
2006	-0.523375689983368
2007	-0.466508984565735
2008	-0.367752313613892
2009	-0.316738784313202
2010	-0.392555356025696
2011	-0.386364638805389
2012	-0.488716810941696
2013	-0.425340503454208
2014	-0.26849365234375
2015	-0.37079980969429
2016	-0.395615547895432
2017	-0.372240543365479
2018	-0.314388334751129
2019	-0.223895654082298
2020	-0.336040139198303
2021	-0.0650539621710777
2022	-0.103344202041626