1989

7.3

2021

6.9

1983

7.9

2023

8.1

2022

7.6

2005

7.7

2016

7.8

2023

8.4

2014

7.4

2010

8.2

2011

7.2

2008

8.5

2008

8.1

1999

6.6

1994

8.7

1972

8.7

1995

5.4

2014

8.4

2013

6.3

2020

7.3