Year	Number
1996	-0.309772878885269
1998	-0.154734894633293
2000	-0.288512378931046
2002	-0.165764808654785
2003	-0.349703222513199
2004	-0.22633421421051
2005	-0.500911414623261
2006	-0.315376073122025
2007	-0.305537134408951
2008	-0.252038717269897
2009	-0.216534748673439
2010	-0.172244891524315
2011	-0.211610183119774
2012	-0.263000935316086
2013	-0.287112712860107
2014	-0.284290075302124
2015	-0.325637251138687
2016	-0.299814790487289
2017	-0.369767844676971
2018	-0.291999518871307
2019	-0.335179150104523
2020	-0.270502895116806
2021	-0.327891737222672
2022	-0.291810005903244