Year	Number
1996	-0.540713310241699
1998	-0.79969733953476
2000	-0.692695796489716
2002	-1.00294363498688
2003	-0.960159420967102
2004	-1.05573272705078
2005	-0.919886887073517
2006	-1.0665237903595
2007	-1.09786081314087
2008	-1.14979684352875
2009	-0.974365472793579
2010	-1.10220277309418
2011	-1.13208639621735
2012	-1.08209621906281
2013	-1.11327660083771
2014	-1.17395925521851
2015	-1.19534075260162
2016	-1.27306926250458
2017	-1.42667186260223
2018	-1.6713570356369
2019	-1.72234714031219
2020	-1.88906502723694
2021	-1.87447190284729
2022	-1.68818092346191