1973

6.3

2023

7.3

2021

6.1

1993

6.3

2015

8.0

2012

9.4

1979

7.6

2020

7.0

2008

5.8

2018

4.7

2017

5.5

2014

7.4

2010

5.6

2023

7.1

1981

5.1

1996

5.9

1981

7.2

2021

6.8

1987

7.4

2004

9.9