Year	Number
1996	1.10283946990967
1998	1.15747666358948
2000	1.20222544670105
2002	1.18893682956696
2003	1.03227174282074
2004	0.98453950881958
2005	0.942519128322601
2006	1.02023363113403
2007	1.09843242168427
2008	1.12191426753998
2009	1.00714540481567
2010	0.988209545612335
2011	0.960108458995819
2012	0.934573888778687
2013	0.924448728561401
2014	1.04737842082977
2015	0.951491832733154
2016	0.852161884307861
2017	0.849596917629242
2018	0.774486243724823
2019	0.904696941375732
2020	0.915464580059052
2021	0.904381930828094
2022	0.869135797023773