Year	Number
1996	1.2862948179245
1998	1.24264001846313
2000	1.20019292831421
2002	1.30751407146454
2003	1.27625250816345
2004	1.23305141925812
2005	1.22431552410126
2006	0.975267469882965
2007	1.00311207771301
2008	1.01124441623688
2009	1.05841326713562
2010	1.02578413486481
2011	0.996393918991089
2012	1.03611195087433
2013	1.03856325149536
2014	1.11952006816864
2015	1.10160684585571
2016	1.04298377037048
2017	1.10225188732147
2018	1.10758209228516
2019	1.10570216178894
2020	1.15511405467987
2021	1.10616540908813
2022	1.11392903327942