1986

4.6

1984

6.1

1977

6.8

1989

6.8

1969

6.0

2003

9.1

1981

5.5

1982

7.6

1988

6.5

1984

7.4

1980

6.5

1993

4.8

1968

7.8

1975

6.7

1991

5.4

1989

7.8

1993

5.9

1989

8.3

1990

7.9

1979

0.0

1995

6.3

1996

6.8

1986

5.5

2000

6.7