1970

6.536 DM

1971

6.863 DM

1972

7.826 DM

1973

8.872 DM

1974

8.952 DM

1975

8.886 DM

1976

9.379 DM

1977

9.803 DM

1978

10.459 DM

1979

10.701 DM

1980

11.288 DM

1981

11.253 DM

1982

12.208 DM

1983

13.881 DM

1984

14.429 DM

1985

14.452 DM

1986

14.480 DM

1987

14.507 DM

1988

14.555 DM

1989

15.509 DM

1990

17.402 DM

1991

19.591 DM

1992

19.253 DM

1993

19.459 DM

1994

20.264 DM

1995

20.595 DM

1996

20.698 DM

1997

21.155 DM

1998

21.652 DM

1999

22.795 DM

2000

11.443 €

2001

12.072 €

2002

13.778 €

2003

14.094 €

2004

13.630 €

Quelle: