1994

8.4

1999

7.0

2001

7.9

2012

6.8

2020

7.4

2006

8.2

2017

7.7

2005

8.3

1993

8.6

1978

7.1

1957

6.8

2020

7.5

2023

9.8

2011

7.7

2008

8.3

1982

7.4

2024

7.3

2015

7.8

2017

6.3

2015

8.7