Year	Number
1996	0.123815298080444
1998	0.370574235916138
2000	0.251223832368851
2002	0.345927983522415
2003	0.073229543864727
2004	0.0841383635997772
2005	-0.157522633671761
2006	-0.0679050013422966
2007	-0.0613481253385544
2008	-0.0977801457047462
2009	0.0622795186936855
2010	-0.116048209369183
2011	-0.028218861669302
2012	-0.179432675242424
2013	-0.141260921955109
2014	0.209008201956749
2015	0.377415180206299
2016	0.40072774887085
2017	0.380333244800568
2018	0.252037286758423
2019	0.290878117084503
2020	0.235460698604584
2021	0.307120054960251
2022	0.297832071781158