Year	Number
1996	1.06322169303894
1998	1.07899403572083
2000	1.0800769329071
2002	1.10161948204041
2003	1.09449088573456
2004	0.612667918205261
2005	1.20294749736786
2006	1.19100308418274
2007	1.17925786972046
2008	1.22206425666809
2009	1.21314013004303
2010	1.20220327377319
2011	1.16067218780518
2012	1.11139535903931
2013	1.11195397377014
2014	1.12760353088379
2015	1.02268445491791
2016	1.01272130012512
2017	0.985711812973022
2018	0.851036548614502
2019	0.898622810840607
2020	0.873994708061218
2021	0.8556769490242
2022	0.844048798084259