Year	Number
1996	-0.58087569475174
1998	-0.422356635332108
2000	-0.394297510385513
2002	-0.437316596508026
2003	-0.402854233980179
2004	-0.47920498251915
2005	-0.228448659181595
2006	-0.24698968231678
2007	-0.225955650210381
2008	-0.199574172496796
2009	-0.245095103979111
2010	-0.242955058813095
2011	-0.209270849823952
2012	-0.248135596513748
2013	-0.244422689080238
2014	-0.0471440590918064
2015	0.0625733584165573
2016	-0.0188320241868496
2017	-0.0340589806437492
2018	-0.0117323715239763
2019	0.0279832296073437
2020	0.193606421351433
2021	0.243394657969475
2022	0.17549079656601