Year	Number
1996	0.86250102519989
1998	0.749341487884521
2000	0.674277007579803
2002	0.666893184185028
2003	0.706076979637146
2004	0.735869944095612
2005	0.594607651233673
2006	0.513100147247314
2007	0.507903635501862
2008	0.51350462436676
2009	0.437099367380142
2010	0.455533385276794
2011	0.425984054803848
2012	0.53296971321106
2013	0.489367246627808
2014	0.44752436876297
2015	0.45068359375
2016	0.403236478567123
2017	0.393605440855026
2018	0.462329059839249
2019	0.498026460409164
2020	0.488893240690231
2021	0.451135843992233
2022	0.446497648954391