1978

9.7

2006

7.9

1993

7.9

1995

7.8

1973

7.8

1976

7.4

2003

7.8

2017

7.1

2008

3.6

2015

7.5

2021

8.1

2002

8.6

1996

6.4

2014

8.3

2014

6.6

2012

7.7

2009

7.0

2010

8.0

2008

7.6

1982

7.6