Year	Number
1996	-0.376152634620667
1998	-0.615864932537079
2000	-0.290849715471268
2002	0.0573869608342648
2003	-0.185996636748314
2004	-0.314870864152908
2005	-1.44021821022034
2006	-0.527322232723236
2007	-0.341404855251312
2008	-0.168963000178337
2009	-0.165575549006462
2010	-0.179348394274712
2011	-0.162598490715027
2012	-0.386457771062851
2013	-0.353710830211639
2014	-0.16712686419487
2015	-0.232123047113419
2016	-0.17511710524559
2017	-0.874444484710693
2018	-0.886004209518433
2019	-0.908243715763092
2020	-0.890690088272095
2021	-0.695711433887482
2022	-0.711050152778625