1925

7.6

1959

7.9

1967

6.6

2005

7.2

1984

7.3

2000

8.2

1976

8.1

1983

8.2

2001

8.4

2002

8.4

2003

8.5

1930

7.7

1986

7.7

1966

8.2

1993

6.3

2008

6.6

2004

7.0

1985

6.7

1979

8.1

2003

7.2