1964

7.1

2005

6.6

1960

8.4

1947

6.4

2004

7.9

1995

6.4

1960

8.2

2002

7.3

1930

6.1

1938

1.0

1983

5.8

1978

7.5

2002

6.8

2009

6.5

1988

0.0

1991

5.7

1962

5.6

1988

6.6

2003

6.6

1973

7.0