2014

7.8

1996

8.1

2011

6.5

1972

6.4

2012

5.8

2004

6.0

1940

7.1

2020

8.4

2015

5.3

1969

5.1

2011

5.5

2013

6.5

2007

6.1

2010

6.0

2000

5.8

2002

5.8

2013

7.4

2009

8.0

1985

6.2

2014

6.0