2008

8.9

2010

8.5

2008

7.6

2001

7.8

2009

8.4

2011

8.5

2017

7.5

2001

7.6

2025

8.5

2000

7.6

1982

7.9

2010

7.8

2003

8.1

1976

7.8

1990

6.9

1994

8.0

1980

8.3

2022

8.4

2014

8.3

2015

7.5