Year	Number
1996	-0.909467279911041
1998	-1.05510711669922
2000	-1.03906869888306
2002	-1.11379849910736
2003	-0.997566938400269
2004	-0.965075552463531
2005	-0.777090907096863
2006	-0.963064432144165
2007	-0.853146731853485
2008	-0.870992124080658
2009	-0.90478652715683
2010	-0.912053406238556
2011	-0.84945946931839
2012	-0.899536430835724
2013	-0.878931939601898
2014	-0.937642991542816
2015	-0.998269379138947
2016	-0.821773171424866
2017	-0.841677308082581
2018	-0.604826033115387
2019	-0.576705813407898
2020	-0.56505823135376
2021	-0.655436873435974
2022	-0.613315761089325