1929

6.5

1990

7.8

2003

7.6

1994

7.4

1953

7.7

1961

7.2

1998

6.9

2005

6.8

1965

8.5

1968

0.0

1992

7.5

1929

7.5

1995

7.3

1943

7.7

1975

7.5

2001

7.6

1966

7.3

2006

8.2

1962

7.9

1951

6.5