1975

7.4

1966

7.3

1960

4.1

1976

6.0

1959

4.8

2005

7.9

1968

7.1

1968

7.1

1972

7.7

1959

6.4

1999

6.0

1970

3.7

1969

6.1

1980

7.3

1990

6.3

1994

5.0

1957

7.7

1988

0.0

1986

0.0

1958

6.4

1986

6.3

1977

6.3

1973

6.7

1964

7.2

1988

0.0

1959

0.0

1961

4.9

1960

6.0

1960

5.0