2012

6.6

2014

7.3

2008

6.7

2004

7.9

2011

7.6

1994

6.8

2007

8.0

1999

7.6

2003

7.9

2016

7.0

2013

6.7

2021

8.2

2006

7.8

1969

8.2

2018

7.3

2004

8.1

1984

7.8

1987

7.8

2013

7.8

2010

6.8