Year	Number
1996	-1.50014114379883
1998	-1.5365184545517
2000	-1.09891521930695
2002	-1.03428864479065
2003	-1.15174722671509
2004	-1.32960569858551
2005	-1.20153045654297
2006	-0.723485767841339
2007	-0.476487666368485
2008	-0.791121184825897
2009	-0.607343435287476
2010	-0.57457423210144
2011	-0.690497636795044
2012	-0.60703831911087
2013	-0.718096494674683
2014	-0.779243350028992
2015	-0.666826963424683
2016	-0.742775201797485
2017	-0.687493205070496
2018	-0.871749877929688
2019	-0.919094324111938
2020	-0.90572464466095
2021	-0.939240753650665
2022	-0.926501333713531