Year	Number
1996	-0.529502689838409
1998	-0.638316988945007
2000	-0.370226055383682
2002	0.222937241196632
2003	0.0786488428711891
2004	-0.134529516100883
2005	-0.013819258660078
2006	0.0919348746538162
2007	0.108356989920139
2008	0.152134746313095
2009	0.0834904238581657
2010	0.111124783754349
2011	0.131239607930183
2012	0.11426293104887
2013	0.0847850143909454
2014	0.192534193396568
2015	0.227381259202957
2016	0.268992602825165
2017	0.274451971054077
2018	0.215548977255821
2019	0.265319764614105
2020	0.247331380844116
2021	0.175867527723312
2022	0.0513254441320896