2014

6.5

1984

9.2

2013

7.6

1982

5.7

2011

6.8

6.4

1972

4.0

1954

7.0

1991

8.1

2007

9.9

2008

6.9

2014

8.0

1994

5.9

2012

8.2

1931

5.8

2007

7.1

2020

5.5

1979

7.6

2001

7.2