Year	Number
1996	1.04270124435425
1998	1.08761632442474
2000	1.07567167282104
2002	1.08781957626343
2003	1.01259672641754
2004	1.01662766933441
2005	0.944372296333313
2006	0.803532481193542
2007	0.879502356052399
2008	0.953482151031494
2009	1.02687239646912
2010	1.03761112689972
2011	1.02762770652771
2012	1.06427574157715
2013	0.998138904571533
2014	1.10513818264008
2015	1.0397537946701
2016	0.844191014766693
2017	0.7759810090065
2018	0.7101930975914
2019	0.671857714653015
2020	0.61527281999588
2021	0.579481720924377
2022	0.60035628080368