1990

5.8

1984

7.6

1989

7.0

1974

5.0

1986

10.0

1966

7.3

1986

5.5

1973

5.0

1982

5.7

1976

6.8

1993

6.3

1971

6.5

1976

8.3

1976

6.6

1977

6.8

1971

6.2

1984

7.1

1993

7.1

1975

3.3

1981

6.5

1982

7.3

1969

4.0

1973

5.7

1951

8.7

1974

4.6

1968

7.1

1991

4.0

1975

3.2

1967

6.9

1974

0.0

1982

7.5

1986

7.1

1974

6.4

1977

6.3

1972

4.5

1984

7.3

1970

7.8

1973

6.1

1974

6.2

1972

7.5

1973

6.6

1983

6.4

1989

8.3

1974

6.1

1987

8.4

1968

6.9

1996

5.3

1966

6.1

1984

4.8

1979

7.0

1966

6.6

1976

6.2

1997

6.5

1977

6.3

1995

3.3

1968

5.3

1989

6.7

1966

7.2

1975

3.5

1972

7.0

1983

0.0

1970

4.5

1970

6.5

1976

0.0

1975

7.0