Year	Number
1998	0.497083395719528
2000	-0.177505895495415
2002	-0.156703546643257
2003	-0.411994487047195
2004	-0.467464655637741
2005	-0.354254245758057
2006	-0.383750975131989
2007	-0.381186187267303
2008	-0.239523485302925
2009	-0.219349294900894
2010	-0.253896862268448
2011	-0.222925066947937
2012	-0.129764124751091
2013	-0.286885976791382
2014	-0.0751493573188782
2015	-0.123158074915409
2016	-0.0815123319625854
2017	-0.0845100879669189
2018	-0.0145488446578383
2019	-0.0298482794314623
2020	-0.0429740846157074
2021	-0.0434206426143646
2022	-0.11826478689909