1958

6.7

1964

5.2

1967

4.4

1975

4.8

1971

6.9

1964

7.9

1974

4.0

1961

0.0

1974

6.2

1960

6.3

1976

6.8

1971

6.5

1974

5.8

1967

5.0

1964

6.9

1972

7.8

1965

6.1

1955

6.6

1974

6.1

1965

7.8

1982

7.5

1973

7.0

1963

5.3

1968

4.7

1976

0.0

1969

6.0

1968

5.7

1965

7.5

1967

7.1

1960

6.5

1958

5.3

1968

0.0

1959

7.1

1976

8.6

1960

6.4

1974

6.2

1975

6.7

1972

5.0

1966

6.1

1962

7.8

1960

7.6

1979

6.4

1969

5.2

1968

6.8

1969

6.0

1962

6.0

1963

0.0

1966

7.2

1967

6.5

1967

6.8

1968

6.5

1973

5.3

1970

7.8

1972

5.0

1977

5.5

1968

6.0

1962

6.4

1972

7.1

1973

6.6

1974

5.2

1976

4.6