Year	Number
1996	-0.173729807138443
1998	-0.161171495914459
2000	-0.173168584704399
2002	-0.103229910135269
2003	-0.560890138149261
2004	-0.495305836200714
2005	-0.491697430610657
2006	-0.321416348218918
2007	-0.283821403980255
2008	-0.351098924875259
2009	-0.306162863969803
2010	-0.258041173219681
2011	-0.238061502575874
2012	-0.216407060623169
2013	-0.332616418600082
2014	-0.277615696191788
2015	-0.368251025676727
2016	-0.0993876680731773
2017	-0.125497415661812
2018	0.00820671487599611
2019	-0.00252702389843762
2020	-0.10893253237009
2021	-0.253772854804993
2022	-0.27089050412178