Year	Number
1996	1.4541187286377
1998	1.29750728607178
2000	1.54021811485291
2002	1.47916531562805
2003	1.16710090637207
2004	1.30585932731628
2005	1.41652750968933
2006	1.41256189346313
2007	1.34514999389648
2008	1.31798684597015
2009	1.32123482227325
2010	1.44162690639496
2011	1.47659265995026
2012	1.54359126091003
2013	1.49895906448364
2014	1.44105923175812
2015	1.1831693649292
2016	1.02332496643066
2017	1.00147747993469
2018	0.958148717880249
2019	0.979157269001007
2020	1.10673403739929
2021	0.956733345985413
2022	0.968280136585236