Year	Number
2000	0.663882613182068
2002	0.699001014232636
2003	0.379185646772385
2004	0.327962130308151
2005	0.357880175113678
2006	0.33128297328949
2007	0.288873612880707
2008	0.295059740543365
2009	0.205823689699173
2010	0.160080075263977
2011	0.157503336668015
2012	0.146088868379593
2013	0.153680056333542
2014	0.153853490948677
2015	0.154178306460381
2016	0.183683604001999
2017	0.169922694563866
2018	0.160408109426498
2019	0.15968582034111
2020	0.150902152061462
2021	0.150671124458313
2022	0.153795778751373