2004

8.3

2006

7.9

2001

6.6

1996

5.4

1993

6.6

1982

7.6

1998

7.2

1978

6.8

1992

5.8

2004

8.6

5.8

2002

7.5

2011

8.1

2022

7.1

2016

7.4

2014

6.6

2018

8.0

2012

7.7

2021

7.7

2023

8.5