2011

8.9

2008

6.7

1981

7.9

2003

7.3

2023

9.7

2014

7.1

1990

7.6

2001

7.2

1975

6.9

1976

6.6

2014

7.9

2004

8.0

2017

7.9

2004

7.5

2005

7.1

2016

7.0

2013

6.8

2013

6.7

1962

7.8

2017

6.8