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	0.821486234664917
2016	0.846926331520081
2017	1.21373701095581
2018	1.19479954242706
2019	1.17167043685913
2020	1.1660121679306
2021	1.1722332239151
2022	1.09686291217804