Year	Number
2004	-0.126988679170609
2005	0.224700346589088
2006	0.245477885007858
2007	0.481087028980255
2008	0.498479098081589
2009	0.497974842786789
2010	0.487727552652359
2011	0.481366097927094
2012	0.48122963309288
2013	0.487086772918701
2014	0.438977479934692
2015	0.443229764699936
2016	0.48297905921936
2017	0.510402023792267
2018	0.498739510774612
2019	0.490093946456909
2020	0.632899343967438
2021	0.639231383800507
2022	0.667918145656586