1989

8.1

1981

5.3

1988

0.0

2001

6.8

1997

7.5

1984

2.0

1979

6.8

1985

7.1

1993

6.1

1994

8.2

1970

6.3

1994

7.0

2004

7.8

1991

6.6

1981

0.0

2002

5.0

1977

7.4

1982

0.0