Year	Number
1996	1.32520198822021
1998	1.42638552188873
2000	1.58620870113373
2002	1.59826338291168
2003	1.547776222229
2004	1.31764233112335
2005	1.38035714626312
2006	1.23125755786896
2007	1.26963186264038
2008	1.27317667007446
2009	1.24936008453369
2010	1.25345623493195
2011	1.06393671035767
2012	1.06507515907288
2013	1.04275786876678
2014	1.12549698352814
2015	1.05367743968964
2016	1.06645977497101
2017	1.23830723762512
2018	1.27142131328583
2019	1.0135281085968
2020	0.998400986194611
2021	0.887379705905914
2022	0.913422584533691