Year	Number
1996	0.926167070865631
1998	1.03417026996613
2000	0.988002359867096
2002	1.0729513168335
2003	1.0705794095993
2004	1.09341907501221
2005	0.992168545722961
2006	1.06822168827057
2007	1.07301092147827
2008	1.09165287017822
2009	1.08552134037018
2010	1.10565173625946
2011	1.13372588157654
2012	1.11192464828491
2013	1.11684858798981
2014	1.1703360080719
2015	1.18688273429871
2016	1.20804572105408
2017	1.21444833278656
2018	1.19011688232422
2019	1.17932105064392
2020	1.16753268241882
2021	1.18000292778015
2022	1.19773054122925