2003

6.1

1971

0.0

1975

5.0

1961

5.7

1977

6.8

1956

5.5

1978

5.8

1967

6.5

1967

6.9

1987

6.4

1970

7.3

1962

6.1

1974

5.0

1967

6.7

1975

7.4

1959

5.4

1973

6.1

1998

4.8

1980

7.7

1958

4.6

1982

6.0

1995

6.0

1989

4.0

1977

6.6

1959

7.7

1961

5.0

1990

6.0