1985

6.1

2023

6.8

2018

6.3

1992

6.4

6.6

2020

6.4

2004

7.3

2024

7.2

2023

6.5

1991

5.9

2015

6.4

2011

6.4

2007

7.9

2006

7.7

1997

6.1

1972

6.3

1993

7.6

2016

7.0

6.6

2015

6.6