2002

6.7

2006

7.8

2008

6.9

1961

7.3

1970

6.4

2005

6.2

1936

0.0

2006

6.5

1934

6.1

1938

1.0

1988

7.5

2007

5.6

1929

6.0

1929

6.0

2007

6.9

1989

6.8

2007

6.1

1938

5.0

1999

7.6

1996

6.3