Year	Number
1996	-0.599355578422546
1998	-0.823301255702972
2000	-0.813736259937286
2002	-0.959111213684082
2003	-0.920870661735535
2004	-0.866649389266968
2005	-0.950093030929565
2006	-1.29791927337646
2007	-1.37891387939453
2008	-1.35054492950439
2009	-1.35833787918091
2010	-1.41616463661194
2011	-0.370504289865494
2012	-0.171652227640152
2013	-0.0844273641705513
2014	0.19294935464859
2015	0.241406425833702
2016	0.303749322891235
2017	0.162129759788513
2018	0.191849708557129
2019	0.266048967838287
2020	0.284374177455902
2021	0.186393916606903
2022	-0.183771133422852