Year	Number
1996	-0.636936128139496
1998	-0.599871158599854
2000	-0.650617778301239
2002	-0.859748542308807
2003	-1.01234650611877
2004	-1.03074407577515
2005	-1.2096973657608
2006	-0.992693543434143
2007	-0.909020006656647
2008	-0.892137885093689
2009	-0.962556421756744
2010	-0.868846118450165
2011	-0.839057266712189
2012	-0.84342086315155
2013	-0.73419201374054
2014	-0.416429966688156
2015	-0.554707646369934
2016	-0.432825565338135
2017	-0.416994154453278
2018	-0.723398149013519
2019	-0.816826343536377
2020	-0.738060235977173
2021	-0.615879833698273
2022	-0.595122039318085