Year	Number
1996	-0.364998608827591
1998	-0.662787318229675
2000	-0.68286794424057
2002	-0.255784124135971
2003	0.236966237425804
2004	-0.116337485611439
2005	-0.0663353949785233
2006	-0.261023759841919
2007	0.150905832648277
2008	-0.00685302773490548
2009	0.227863356471062
2010	0.071855328977108
2011	-0.06386898458004
2012	0.154794976115227
2013	0.11038514226675
2014	-0.297135800123215
2015	-0.256798654794693
2016	-0.667951107025146
2017	-0.626211225986481
2018	-0.451120525598526
2019	-0.420044243335724
2020	-0.77164226770401
2021	-0.804036557674408
2022	-0.797183930873871