Year	Number
2004	0.791444957256317
2005	0.789309144020081
2006	0.299861043691635
2007	0.30806240439415
2008	0.317555278539658
2009	0.347466081380844
2010	0.328756839036942
2011	0.310445874929428
2012	0.29941114783287
2013	0.303055047988892
2014	1.22070860862732
2015	1.15181076526642
2016	1.15955591201782
2017	1.76215100288391
2018	1.78090953826904
2019	1.78070986270905
2020	1.26600527763367
2021	1.2798718214035
2022	1.27020359039307