Year	Number
2004	0.839596450328827
2005	1.10941541194916
2006	1.06922149658203
2007	1.09091985225677
2008	1.11797952651978
2009	1.1250547170639
2010	1.11120820045471
2011	1.09095239639282
2012	1.09636723995209
2013	1.10133159160614
2014	1.40708005428314
2015	1.28536283969879
2016	1.27953577041626
2017	1.29476916790009
2018	1.29671347141266
2019	1.26845979690552
2020	1.11943030357361
2021	1.13890171051025
2022	1.22111785411835