Year	Number
1996	-1.92411243915558
1998	-2.06768083572388
2000	-2.11682319641113
2002	-2.13580799102783
2003	-2.18969345092773
2004	-2.06829833984375
2005	-2.16315007209778
2006	-2.31339502334595
2007	-2.23763728141785
2008	-2.22634243965149
2009	-2.27049374580383
2010	-2.22747778892517
2011	-2.24172234535217
2012	-2.24007630348206
2013	-2.25171279907227
2014	-2.19333982467651
2015	-2.20195960998535
2016	-2.18027639389038
2017	-2.20318675041199
2018	-2.21095252037048
2019	-2.20631074905396
2020	-2.15489602088928
2021	-2.06180953979492
2022	-2.02192330360413