Year	Number
1996	0.611503779888153
1998	0.495435953140259
2000	0.687826871871948
2002	0.66788649559021
2003	0.880270600318909
2004	0.903343915939331
2005	0.937840044498444
2006	1.14691519737244
2007	1.00763607025146
2008	1.15763688087463
2009	1.00224792957306
2010	1.07666647434235
2011	1.06727397441864
2012	0.945922076702118
2013	0.967353165149689
2014	1.01201784610748
2015	1.03646206855774
2016	1.05531477928162
2017	1.07227087020874
2018	1.15059268474579
2019	1.13979399204254
2020	1.29915964603424
2021	1.34501802921295
2022	1.34313404560089