Year	Number
1996	1.80815303325653
1998	1.80328798294067
2000	1.81233263015747
2002	1.85791265964508
2003	1.84791743755341
2004	1.81666433811188
2005	1.84724950790405
2006	1.8997688293457
2007	1.94182562828064
2008	1.91069889068604
2009	1.77744269371033
2010	1.80120265483856
2011	1.79896306991577
2012	1.85712373256683
2013	1.83403825759888
2014	1.93850040435791
2015	1.81485080718994
2016	1.76159679889679
2017	1.79901742935181
2018	1.85344958305359
2019	1.86225032806396
2020	1.77016341686249
2021	1.75251877307892
2022	1.70585024356842