2004

6.9

1994

5.4

2000

4.8

1991

7.3

1938

7.5

1931

8.3

1914

6.5

1930

6.1

2005

5.7

1944

7.0

1940

6.5

1940

8.3

1987

6.0

2006

7.0

1999

7.1

1984

7.1

1990

6.5