Year	Number
1996	1.12929081916809
1998	1.06397449970245
2000	1.04071915149689
2002	1.03865301609039
2003	0.985716998577118
2004	1.17716777324677
2005	1.05702924728394
2006	1.06452357769012
2007	1.11190748214722
2008	1.03202378749847
2009	1.03421604633331
2010	0.962826371192932
2011	0.911823928356171
2012	0.916809260845184
2013	0.954217374324799
2014	0.999287128448486
2015	1.03478991985321
2016	1.03497838973999
2017	0.990614295005798
2018	0.963564574718475
2019	0.905116975307465
2020	1.05466663837433
2021	1.08490908145905
2022	1.07030594348907