Year	Number
2003	1.16978526115417
2004	1.13185334205627
2005	1.0707448720932
2006	1.04072260856628
2007	1.08896553516388
2008	1.01208281517029
2009	1.3850017786026
2010	1.45398449897766
2011	1.06180381774902
2012	1.02640020847321
2013	1.054114818573
2014	0.601334393024445
2015	1.08801794052124
2016	1.1088570356369
2017	0.931889772415161
2018	0.944292485713959
2019	0.792732000350952
2020	0.7760409116745
2021	0.78711211681366
2022	0.880902826786041