Year	Number
1996	-0.696724593639374
1998	-0.738637685775757
2000	-0.718046724796295
2002	-0.557922065258026
2003	-0.588656902313232
2004	-0.545422077178955
2005	-0.700787901878357
2006	-0.70465487241745
2007	-0.751626133918762
2008	-0.730335593223572
2009	-0.624266803264618
2010	-0.566099524497986
2011	-0.580825686454773
2012	-0.58197021484375
2013	-0.574129939079285
2014	-0.522220551967621
2015	-0.499133169651031
2016	-0.495757699012756
2017	-0.523573160171509
2018	-0.566928744316101
2019	-0.5202516913414
2020	-0.385730803012848
2021	-0.531429529190063
2022	-0.551391065120697