2010

6.6

1970

7.7

1926

8.0

2013

7.2

1995

6.1

1979

7.5

2008

7.0

2004

4.8

1970

8.2

2000

7.4

6.4

2004

6.6

2014

6.9

1983

7.5

1962

7.5

2012

7.7

2014

5.7

2013

5.8

1972

7.2

2015

5.5