Year	Number
1996	1.07292950153351
1998	0.946786463260651
2000	0.958087980747223
2002	1.01447093486786
2003	1.08260369300842
2004	1.04349458217621
2005	1.0062769651413
2006	0.954123318195343
2007	0.969946265220642
2008	0.948859214782715
2009	1.02105367183685
2010	1.04070508480072
2011	1.07113337516785
2012	1.10129523277283
2013	1.10964703559875
2014	1.03611397743225
2015	0.988072454929352
2016	0.983630776405334
2017	1.00370442867279
2018	0.99475222826004
2019	0.929792582988739
2020	0.983319520950317
2021	1.06673097610474
2022	1.01706731319427