1982

7.5

2015

7.8

2012

8.6

2004

8.4

2021

8.2

2021

7.9

2018

7.1

1996

8.0

2017

7.9

1989

5.9

2019

7.5

2008

7.4

1974

8.0

2014

8.2

2003

7.6

1983

7.8

2006

7.8

1993

6.7

2009

8.3

1975

7.0