2005

7.6

1988

7.8

2005

6.3

1972

7.1

1997

7.6

2014

7.4

1937

6.6

1980

6.1

2004

1.0

2003

7.2

1970

7.1

1971

5.4

1945

7.6

2007

6.9

1974

5.4

2007

5.8

2008

5.5

2001

5.9

1997

6.0

1998

5.4