Year	Number
1996	-1.19204592704773
1998	-1.20836997032166
2000	-1.05737936496735
2002	-1.07195007801056
2003	-0.880337357521057
2004	-0.70136547088623
2005	-0.764629542827606
2006	-0.633319139480591
2007	-0.858715116977692
2008	-0.604502141475677
2009	-0.721999883651733
2010	-0.74055814743042
2011	-0.736359298229218
2012	-0.454691231250763
2013	-0.432592630386353
2014	-0.490966618061066
2015	-0.623982071876526
2016	-0.451145976781845
2017	-0.518492341041565
2018	-0.670606136322021
2019	-0.706194877624512
2020	-1.075679063797
2021	-1.07374393939972
2022	-1.06442642211914