Year	Number
1996	-0.626190364360809
1998	-0.408068776130676
2000	-0.701925754547119
2002	-0.253289312124252
2003	-0.855547189712524
2004	-0.671642243862152
2005	-0.583453714847565
2006	-0.357518166303635
2007	-0.38706237077713
2008	-0.228933870792389
2009	0.0891812443733215
2010	0.0144716212525964
2011	-0.0241334792226553
2012	0.0514542907476425
2013	-0.162120848894119
2014	-0.597118556499481
2015	-0.423460692167282
2016	-0.448246777057648
2017	-0.570162177085876
2018	-0.580516219139099
2019	-0.388441443443298
2020	-0.480818122625351
2021	-0.335592776536942
2022	-0.265859961509705