1990

6.1

1985

6.6

1972

7.3

1970

6.4

1981

5.9

1979

7.5

2006

7.2

1990

6.4

1994

6.3

1983

6.1

1971

7.0

1976

7.2

0.0

1982

6.0

1968

7.8

1951

7.7

1987

6.5

1993

5.5

2006

7.8

1981

7.5