1992

6.9

1982

5.7

2016

7.5

2009

6.6

2015

6.8

2009

7.4

2006

7.1

2010

5.8

1995

7.9

1990

5.8

2015

7.2

1972

8.7

2007

6.9

2008

7.7

2013

6.9

1944

6.0

2005

5.3

2014

7.3

2008

8.5

2003

6.4