Year	Number
1996	0.703103303909302
1998	0.673875689506531
2000	0.687808454036713
2002	0.708452701568604
2003	0.724850833415985
2004	0.316238701343536
2005	0.328990906476974
2006	0.344787657260895
2007	0.339864432811737
2008	0.332282036542892
2009	0.364052087068558
2010	0.376758366823196
2011	0.369382977485657
2012	0.360471665859222
2013	0.35170841217041
2014	0.517064273357391
2015	0.364049166440964
2016	0.324651092290878
2017	0.309949576854706
2018	0.326796323060989
2019	0.331756561994553
2020	0.344151318073273
2021	0.333089828491211
2022	0.321797221899033