Year	Number
1996	-1.69988143444061
1998	-1.26876902580261
2000	-0.738669097423553
2002	-0.390101492404938
2003	-0.321591943502426
2004	-0.361318320035934
2005	-0.372446328401566
2006	-0.505195736885071
2007	-0.31247279047966
2008	-0.313796252012253
2009	-0.116848014295101
2010	-0.180995032191277
2011	-0.236089617013931
2012	-0.223774790763855
2013	-0.250444710254669
2014	-0.201299339532852
2015	-0.150820329785347
2016	-0.148735702037811
2017	-0.115477047860622
2018	-0.137490570545197
2019	-0.116008624434471
2020	-0.159918710589409
2021	-0.0837725549936295
2022	-0.0578916594386101