1984

7.6

1959

7.5

1971

6.5

1962

7.6

1975

4.1

1964

6.9

1955

6.6

1982

7.5

1973

7.0

1968

4.7

1969

6.6

1969

7.0

1975

6.7

1965

6.1

1969

5.4

1970

5.8

1976

4.7

1972

5.3