2003

8.2

2015

8.7

2013

7.6

1980

7.3

1998

7.2

2010

6.7

2014

4.3

1993

6.6

1999

8.2

2010

7.7

1962

7.8

2004

8.6

1984

7.2

2019

8.0

2021

7.8

2004

9.5

1992

6.9

2010

7.0

2023

7.7

2017

8.1