Year	Number
1996	-0.102563485503197
1998	0.0245824474841356
2000	-0.0217283759266138
2002	-0.078193411231041
2003	-0.284974277019501
2004	-0.244661465287209
2005	-0.437574356794357
2006	-0.212712377309799
2007	-0.215945512056351
2008	-0.159162044525146
2009	-0.0905578508973122
2010	-0.119565077126026
2011	-0.176636278629303
2012	-0.110853657126427
2013	-0.0910557433962822
2014	-0.0279159974306822
2015	-0.0984931141138077
2016	-0.155640959739685
2017	-0.158644407987595
2018	-0.259155303239822
2019	-0.154595121741295
2020	-0.0479148365557194
2021	-0.133877843618393
2022	-0.0868896543979645