Year	Number
1996	-0.533678114414215
1998	-0.433107793331146
2000	-0.394928753376007
2002	0.283649951219559
2003	0.123504690825939
2004	0.0678435117006302
2005	-0.0780683010816574
2006	-0.0125321475788951
2007	-0.109465233981609
2008	-0.165581718087196
2009	-0.0791570097208023
2010	-0.118834763765335
2011	-0.0224449206143618
2012	-0.0336579568684101
2013	-0.0413553081452847
2014	-0.0187257844954729
2015	-0.0769509747624397
2016	-0.162973880767822
2017	-0.159313708543777
2018	-0.113984152674675
2019	-0.140877202153206
2020	-0.11665365844965
2021	-0.263698995113373
2022	-0.251350313425064