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	0.989585757255554
2015	1.36598539352417
2016	1.38275027275085
2017	1.39288794994354
2018	1.39100873470306
2019	1.22583997249603
2020	1.1772255897522
2021	1.17249691486359
2022	1.20484304428101