Jahr,Veränderung
1980,0.545747847
1981,0.416241085
1982,0.587793165
1983,0.607177853
1984,0.637758506
1985,0.77955136
1986,0.506033817
1987,1.060200173
1988,0.464098225
1989,0.468829902
1990,0.694189001
1991,0.720836289
1992,-0.161522955
1993,0.471413184
1994,0.325232774
1995,0.370995472
1996,0.553064392
1997,0.50168593
1998,0.645018656
1999,0.730292695
2000,0.300329023
2001,0.293326722
2002,0.958795743
2003,0.537190861
2004,0.246177135
2005,0.315469204
2006,0.467989657
2007,0.631587536
2008,0.665583159
2009,0.558673535
2010,0.394287025
2011,0.466354313
2012,0.33605013
2013,0.754389815
2014,0.921555325
2015,0.816908484
2016,0.688868613
2017,0.501179759
2018,0.343666446
2019,0.442713373
2020,0.497878768