Year	Number
1996	-0.9305459856987
1998	-0.903203785419464
2000	-0.906757354736328
2002	-0.717909097671509
2003	-0.777412176132202
2004	-0.757493495941162
2005	-0.772508382797241
2006	-0.650104701519012
2007	-0.632185876369476
2008	-0.666399776935577
2009	-0.704722344875336
2010	-0.694108724594116
2011	-0.667876601219177
2012	-0.608586847782135
2013	-0.501512408256531
2014	-0.44789931178093
2015	-0.476131945848465
2016	-0.442177504301071
2017	-0.582520842552185
2018	-0.504966139793396
2019	-0.435477554798126
2020	-0.390404462814331
2021	-0.422970861196518
2022	-0.44087877869606