1980

8.4

2002

4.7

2018

6.0

2023

8.5

1984

7.3

2013

6.6

1991

5.2

2005

6.7

2013

5.5

2019

7.7

1989

7.1

2022

5.6

1990

5.7

2016

6.6

1984

6.0

2009

7.4

1972

5.8

2005

4.3

2006

6.3