Year	Number
1996	0.421651005744934
1998	0.431974202394485
2000	0.861537575721741
2002	1.31074380874634
2003	1.33278954029083
2004	1.25959527492523
2005	1.26966309547424
2006	0.506991565227509
2007	0.405738353729248
2008	0.407875597476959
2009	0.483497262001038
2010	0.472344607114792
2011	0.431618601083755
2012	0.533097982406616
2013	0.466359108686447
2014	0.456755250692368
2015	0.0479270443320274
2016	-0.00791920814663172
2017	0.0983494743704796
2018	0.0021510876249522
2019	-0.0226697735488415
2020	-0.0160306729376316
2021	0.369727611541748
2022	0.115151450037956