1979

7.0

1968

7.1

1999

7.9

1971

3.0

1990

7.4

1982

6.9

1971

8.1

1988

5.8

1978

7.7

1996

6.9

1976

6.0

1984

7.6

1960

6.2

1983

3.5

1995

7.6

2003

6.2

1966

6.1

1989

6.3

1975

7.3

1969

6.0

1991

6.8

1985

7.3

1989

5.8

1976

7.9

1987

6.2