Year	Number
1996	0.421651005744934
1998	0.431974202394485
2000	0.409671247005463
2002	-0.0708565190434456
2003	0.854120075702667
2004	1.40004050731659
2005	0.508783102035522
2006	0.34546309709549
2007	0.448612660169601
2008	0.431776791810989
2009	0.160476461052895
2010	0.412911593914032
2011	0.43340277671814
2012	0.417734086513519
2013	0.546406924724579
2014	0.843831837177277
2015	0.569338977336884
2016	0.794970512390137
2017	0.5958611369133
2018	0.675081074237823
2019	0.665671944618225
2020	0.770509839057922
2021	0.815776765346527
2022	0.868675053119659