Year	Number
1996	-0.103825636208057
1998	-0.00821057427674532
2000	-0.108343385159969
2002	-0.0870445370674133
2003	0.209610521793365
2004	0.168824627995491
2005	0.213584735989571
2006	0.187260136008263
2007	0.131010442972183
2008	0.0151520045474172
2009	0.00317180575802922
2010	-0.0824492052197456
2011	-0.159755006432533
2012	-0.100325390696526
2013	-0.116462923586369
2014	-0.0709605738520622
2015	-0.0980892330408096
2016	-0.131173372268677
2017	-0.205769211053848
2018	-0.259293049573898
2019	-0.243577122688293
2020	-0.322684556245804
2021	-0.316597819328308
2022	-0.325712889432907