1982

7.5

1941

8.0

2008

7.3

2010

8.2

2014

7.9

1984

7.5

1997

6.5

1999

6.6

2012

7.4

2001

6.8

2013

7.9

2014

6.5

1999

8.4

2000

7.7

2006

6.6

1950

7.0

2009

8.2

1982

7.9

2009

7.6

1972

8.7