2017

6.9

1977

6.7

2002

4.5

2007

7.7

2012

5.9

1937

7.9

2003

5.7

1932

7.8

2000

8.0

2019

7.4

2008

6.1

2006

7.4

1930

6.8

1989

7.1

2014

7.9

1971

7.1

1989

7.8

2005

7.5

1948

7.5

2011

6.5