Year	Number
1996	0.977103769779205
1998	0.936354219913483
2000	0.855439901351929
2002	0.904892265796661
2003	0.920530557632446
2004	0.88249409198761
2005	0.902132928371429
2006	0.861287593841553
2007	0.886551916599274
2008	0.849656224250793
2009	0.902184903621674
2010	0.915654838085175
2011	0.860525906085968
2012	0.92950963973999
2013	0.94001966714859
2014	0.961615204811096
2015	0.973927557468414
2016	1.00003492832184
2017	0.986520111560822
2018	0.901689648628235
2019	0.994766891002655
2020	1.00444412231445
2021	1.03086280822754
2022	1.06380426883698