Year	Number
1996	0.232784986495972
1998	-0.118997246026993
2000	0.0961097478866577
2002	-0.0474211908876896
2003	0.0996745452284813
2004	0.358144611120224
2005	-0.0028113410808146
2006	-0.124705359339714
2007	-0.391314208507538
2008	-0.20475609600544
2009	0.3261559009552
2010	0.456775397062302
2011	0.383940756320953
2012	0.274199098348618
2013	0.338074296712875
2014	-0.332812041044235
2015	-0.3187076151371
2016	-0.244855865836143
2017	-0.194125235080719
2018	-0.188686534762383
2019	-0.427999049425125
2020	-0.253533631563187
2021	-0.213269129395485
2022	-0.134738370776176