Year	Number
1996	1.0152370929718
1998	1.0704607963562
2000	1.13526666164398
2002	1.15602231025696
2003	1.16738212108612
2004	1.1494140625
2005	1.17518937587738
2006	1.01504075527191
2007	1.04105567932129
2008	0.965708434581757
2009	0.909724354743958
2010	0.894237220287323
2011	0.836973130702972
2012	0.749367654323578
2013	0.737192869186401
2014	0.553286671638489
2015	0.559989511966705
2016	0.40205392241478
2017	0.536955773830414
2018	0.487242519855499
2019	0.342962503433228
2020	0.389346241950989
2021	0.397210419178009
2022	0.422079831361771