Year	Number
1996	-0.452226608991623
1998	-0.662553489208221
2000	-0.673456251621246
2002	-0.376179724931717
2003	-0.499138176441193
2004	-0.484211027622223
2005	-0.526238322257996
2006	-0.468877643346787
2007	-0.412203580141068
2008	-0.416781842708588
2009	-0.497236013412476
2010	-0.601686894893646
2011	-0.601444661617279
2012	-0.534914612770081
2013	-0.45216515660286
2014	-0.194581300020218
2015	-0.331282913684845
2016	-0.323035180568695
2017	-0.190596655011177
2018	-0.103585228323936
2019	0.024324506521225
2020	-0.11094256490469
2021	-0.210496202111244
2022	-0.695411026477814