Year	Number
1996	-0.489870309829712
1998	-0.750535488128662
2000	-0.696610867977142
2002	-0.910264730453491
2003	-0.859100699424744
2004	-0.732880175113678
2005	-0.797872185707092
2006	-0.694450855255127
2007	-0.698989927768707
2008	-0.673782587051392
2009	-0.611935317516327
2010	-0.656044900417328
2011	-0.59964394569397
2012	-0.583569049835205
2013	-0.533191502094269
2014	-0.310617834329605
2015	-0.424311131238937
2016	-0.338147759437561
2017	-0.350048094987869
2018	-0.313785791397095
2019	-0.346690058708191
2020	-0.362381368875504
2021	-0.253610879182816
2022	-0.188954651355743