Year	Number
1996	1.07736361026764
1998	1.14266920089722
2000	1.09469890594482
2002	1.11081862449646
2003	0.964284658432007
2004	0.971273601055145
2005	0.816958487033844
2006	0.915722608566284
2007	0.935347318649292
2008	0.96675968170166
2009	1.00583362579346
2010	1.03988945484161
2011	1.0538626909256
2012	1.08821976184845
2013	1.07848346233368
2014	1.13837194442749
2015	1.15159726142883
2016	1.1179666519165
2017	1.12175619602203
2018	1.11910879611969
2019	1.09436094760895
2020	1.12082874774933
2021	1.08112514019012
2022	1.06959331035614