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
2019	0.500275909900665
2020	0.578547716140747
2021	0.548238813877106
2022	0.507792770862579