1983

4.1

1964

6.8

1977

6.6

1968

5.7

1965

5.0

1979

6.1

1973

4.1

1988

5.5

1982

5.4

1980

6.2

1969

5.7

1980

5.5

1984

7.0

1971

7.7

1983

5.0

1975

7.8

1972

6.0

1989

5.9

1973

4.2

1955

0.0

1976

6.9

1967

0.0

1976

5.2

1972

5.7

1975

5.1

1974

2.6

1973

7.5

1966

6.3

1977

4.8

1969

5.2

1976

6.1

1964

5.3

1976

6.4

1967

6.1

1972

0.0

1974

5.8

1969

6.5

1976

7.0

1973

6.9

1971

6.7

1984

4.0

1968

7.5

1977

6.4

1978

6.2

1967

4.5

1979

6.8

1988

3.1

1963

2.0

1971

6.0

1972

4.2

1984

5.8

1981

6.2

1971

3.8

1967

5.0

1974

7.4