Year	Number
1996	-0.380564451217651
1998	-0.349467724561691
2000	-0.396729677915573
2002	-0.598195910453796
2003	-0.800985097885132
2004	-0.955853760242462
2005	-0.861349403858185
2006	-0.924164414405823
2007	-0.724708914756775
2008	-0.815914392471313
2009	-0.965407252311707
2010	-0.896736919879913
2011	-0.920482873916626
2012	-0.989905714988709
2013	-0.931680560112
2014	-0.862226128578186
2015	-1.13534986972809
2016	-0.894321322441101
2017	-0.942965805530548
2018	-0.954992532730103
2019	-1.0925520658493
2020	-0.985539317131042
2021	-0.931248366832733
2022	-0.917344748973846