Year	Number
1996	-0.925459146499634
1998	-0.423062264919281
2000	-0.200209870934486
2002	-0.0583082623779774
2003	-0.11687808483839
2004	-0.214082449674606
2005	-0.445820868015289
2006	-0.636888444423676
2007	-0.729851603507996
2008	-0.804012358188629
2009	-0.686627805233002
2010	-0.726463437080383
2011	-0.667768597602844
2012	-0.662454187870026
2013	-0.714223802089691
2014	-0.853918790817261
2015	-0.801780104637146
2016	-0.633718132972717
2017	-0.806073427200317
2018	-0.673981010913849
2019	-0.843628823757172
2020	-0.791369318962097
2021	-0.688360929489136
2022	-0.691959738731384