Year	Number
1996	1.02667045593262
1998	1.00952386856079
2000	0.987186789512634
2002	0.939704358577728
2003	0.926884114742279
2004	-0.0154205877333879
2005	0.516670823097229
2006	0.406536966562271
2007	0.0564000532031059
2008	-0.373797565698624
2009	-0.381042540073395
2010	-0.384038269519806
2011	-0.384749859571457
2012	-0.401814728975296
2013	-0.457175403833389
2014	-0.374468445777893
2015	-0.43260794878006
2016	-0.495872646570206
2017	-0.437854588031769
2018	-0.531163573265076
2019	-0.55177366733551
2020	-0.588554084300995
2021	-0.613875865936279
2022	-0.657294631004334