Year	Number
1996	1.27892601490021
1998	0.993849754333496
2000	1.00100183486938
2002	1.06982314586639
2003	0.910984516143799
2004	0.848270535469055
2005	0.807715952396393
2006	0.891168355941772
2007	0.816402733325958
2008	0.837563395500183
2009	0.835133969783783
2010	0.909712016582489
2011	1.00532269477844
2012	0.928755700588226
2013	0.97163850069046
2014	1.10547494888306
2015	1.13156735897064
2016	1.04019486904144
2017	0.989848971366882
2018	0.960281312465668
2019	1.01208364963531
2020	0.93614262342453
2021	0.906950950622559
2022	0.94524872303009