1971

6.9

1976

7.0

1971

7.8

1972

8.6

1975

6.3

1999

5.7

1998

5.4

1959

7.5

1967

7.5

1961

0.0

1982

6.9

1971

6.5

1977

5.7

1977

6.8

1981

6.5

1981

5.6

1965

7.9

1964

7.1

1963

5.5

1955

6.6

1994

0.0

1983

0.0

1984

7.4

1984

7.3

1963

5.3

1974

8.0

1966

5.0

1960

5.9

1989

6.6

1987

7.7

1975

7.4

1957

6.8

1966

7.6

1994

5.0

1958

0.0

1984

7.5

1971

5.0

1958

6.5

1963

5.9

1973

6.0

1994

4.1

1995

4.6

1984

7.4

2000

5.8

1964

5.9

1966

6.0

1976

5.0

1960

5.0

1993

7.1

1960

7.6

1965

6.1

1958

6.3

1972

5.3

1980

0.0

1967

6.3

2000

5.6

1973

5.8

1955

8.0

1969

6.4

1972

7.0

1967

6.0

1971

7.1

1958

6.9

1994

6.7

1978

4.0