Year	Number
1996	-0.437426507472992
1998	-0.399805635213852
2000	-0.623196244239807
2002	-0.980350196361542
2003	-0.884173095226288
2004	-1.03957557678223
2005	-0.67262589931488
2006	-0.643211901187897
2007	-0.660764515399933
2008	-0.634429693222046
2009	-0.701457858085632
2010	-0.671865046024323
2011	-0.625150501728058
2012	-0.614259123802185
2013	-0.752406656742096
2014	-0.852723836898804
2015	-0.93696516752243
2016	-0.976331889629364
2017	-0.823586463928223
2018	-0.746429085731506
2019	-0.644489228725433
2020	-0.571009993553162
2021	-0.46891924738884
2022	-0.34193229675293