Year	Number
2003	0.556768476963043
2004	0.330648332834244
2005	0.332869827747345
2006	0.331756144762039
2007	0.308105289936066
2008	0.309818059206009
2009	0.323601871728897
2010	0.320087254047394
2011	0.306695103645325
2012	0.282746523618698
2013	0.297252923250198
2014	0.238057717680931
2015	0.249322980642319
2016	0.253411799669266
2017	0.263454109430313
2018	0.257120162248611
2019	0.252529382705688
2020	0.247384041547775
2021	0.251843899488449
2022	0.260167717933655