Year	Number
1996	-0.691500306129456
1998	-0.611828744411469
2000	-0.620502829551697
2002	-0.609856188297272
2003	-0.460299640893936
2004	-0.451769232749939
2005	-0.447229236364365
2006	-0.21700045466423
2007	-0.259199172258377
2008	-0.211958438158035
2009	-0.074613519012928
2010	-0.0123194148764014
2011	-0.109997875988483
2012	-0.134835928678513
2013	-0.120989866554737
2014	-0.0243250951170921
2015	-0.285884112119675
2016	-0.343549311161041
2017	-0.387264579534531
2018	-0.490081697702408
2019	-0.531054139137268
2020	-0.260907888412476
2021	-0.340914160013199
2022	-0.320332825183868