Year	Number
1996	-0.380564451217651
1998	-0.546766698360443
2000	-0.546417593955994
2002	-0.0457692667841911
2003	-0.197253704071045
2004	-0.118263445794582
2005	-0.142497807741165
2006	-0.261502921581268
2007	-0.381906569004059
2008	-0.177952587604523
2009	-0.0268956422805786
2010	-0.171523153781891
2011	-0.11502830684185
2012	-0.0323866233229637
2013	0.078659787774086
2014	-0.255827993154526
2015	-0.331129431724548
2016	-0.311781495809555
2017	-0.251172304153442
2018	-0.170385882258415
2019	-0.225958585739136
2020	-0.304616540670395
2021	-0.281927227973938
2022	-0.314229518175125