Year	Number
1996	1.27535271644592
1998	1.20461094379425
2000	1.10754191875458
2002	1.13046002388
2003	1.12496137619019
2004	1.11238861083984
2005	1.09229040145874
2006	1.06961452960968
2007	1.06297087669373
2008	1.0173647403717
2009	1.05512344837189
2010	1.04863810539246
2011	1.05691814422607
2012	0.999778091907501
2013	1.00189661979675
2014	0.956131041049957
2015	0.986843705177307
2016	1.01092410087585
2017	1.00672471523285
2018	0.97007554769516
2019	0.977437853813171
2020	0.932308793067932
2021	0.905274868011475
2022	0.972445666790009