2009

6.5

2002

7.7

1958

8.2

1962

7.3

2006

6.6

1971

7.0

2007

6.0

2011

6.9

2006

5.6

2013

6.9

1998

6.6

1939

7.9

2010

6.1

2004

8.0

2008

7.7

2012

7.8

2008

5.2

1967

7.3

2002

6.9

2005

5.5