2002

8.5

1997

8.1

2005

7.1

2007

6.7

2006

4.0

1990

5.6

2023

8.1

2020

7.0

2022

7.6

1982

7.3

1984

4.5

2009

6.8

2004

7.8

2018

7.0

2017

7.2

2006

6.1

1959

0.0

2021

6.2

1979

0.0

2015

2.0