Year	Number
2004	0.338822394609451
2005	0.357602417469025
2006	0.491848856210709
2007	0.511655807495117
2008	0.511172235012054
2009	0.500100314617157
2010	0.478729426860809
2011	0.448948442935944
2012	0.429885238409042
2013	0.457373589277267
2018	0.539004743099213
2019	0.500275909900665
2020	0.578547716140747
2021	0.548238813877106
2022	0.507792770862579