1986

6.2

1956

7.6

1972

7.2

1964

7.0

1980

6.3

1970

6.8

1993

6.8

1970

6.4

1970

7.6

1950

7.5

1939

7.9

2009

6.0

1994

6.6

1955

7.4

1965

6.7

1976

6.8

1996

6.0

2002

5.7

1973

7.7

1964

6.1