Year	Number
1996	1.31952691078186
1998	1.29959452152252
2000	1.27701985836029
2002	1.27498733997345
2003	1.27055943012238
2004	1.3236118555069
2005	1.13140439987183
2006	1.07872498035431
2007	1.12308669090271
2008	1.18532562255859
2009	1.17698621749878
2010	1.12254285812378
2011	1.08586597442627
2012	1.06417882442474
2013	0.988870561122894
2014	0.993750035762787
2015	1.04484903812408
2016	1.04162049293518
2017	1.02147972583771
2018	1.02965259552002
2019	1.03611528873444
2020	1.00441217422485
2021	1.00015807151794
2022	1.01301276683807