Year	Number
1996	-0.0914219319820404
1998	0.17081980407238
2000	0.442086488008499
2002	0.494850069284439
2003	0.326033353805542
2004	0.114305287599564
2005	0.129616141319275
2006	0.511488795280457
2007	0.556039929389954
2008	0.60561341047287
2009	0.44483208656311
2010	0.383502691984177
2011	0.380300343036652
2012	0.340863466262817
2013	0.357050955295563
2014	0.516915023326874
2015	0.411409616470337
2016	0.415314823389053
2017	0.430543959140778
2018	0.296661525964737
2019	0.363338142633438
2020	0.41599440574646
2021	0.370178371667862
2022	0.36726301908493