Year	Number
2004	0.650999784469604
2005	0.789309144020081
2006	0.775587141513824
2007	0.784966588020325
2008	0.797165334224701
2009	0.832615554332733
2010	0.815264821052551
2011	0.791372001171112
2012	0.77997100353241
2013	0.77830171585083
2014	0.634897768497467
2015	0.572009384632111
2016	0.578897595405579
2017	0.581365764141083
2018	0.57742166519165
2019	0.572474777698517
2020	-0.00106619624421
2021	-0.00372900813817978
2022	-0.00595007929950953