1985

7.8

1955

7.7

1999

7.4

2003

7.0

2010

7.9

2017

8.0

2016

7.5

1971

8.1

1993

6.8

2008

5.8

2011

6.9

2019

8.3

1993

6.5

2023

6.6

2021

8.4

2011

7.9

2002

7.2

2016

7.8

2007

7.2

2018

7.3