Year	Number
1996	-0.480376541614532
1998	-0.712693691253662
2000	-0.614017069339752
2002	-1.0382194519043
2003	-0.988194704055786
2004	-0.851008296012878
2005	-1.15597522258759
2006	-0.736575305461884
2007	-0.426525264978409
2008	-0.29572057723999
2009	-0.298555880784988
2010	-0.518517076969147
2011	-0.617963790893555
2012	-0.492649525403976
2013	-0.416076391935349
2014	0.256382942199707
2015	-0.292592734098434
2016	-0.355312615633011
2017	-0.258881121873856
2018	-0.21198371052742
2019	0.00809326115995646
2020	0.112023413181305
2021	0.0624171979725361
2022	0.11759065836668