2005

7.9

1982

7.6

2016

8.1

2007

7.5

2015

7.7

2008

7.8

1999

8.2

2009

8.0

1984

7.4

2009

8.0

2004

8.0

2005

6.9

2001

8.6

2013

7.3

2009

8.0

1963

5.7

2015

7.8

2014

7.4

2008

7.7

2012

7.5