1992

6.5

2014

5.6

2018

6.3

2023

6.4

2013

7.7

2008

6.7

2019

6.7

2024

5.9

1974

6.3

2006

6.7

1985

6.1

1994

6.2

2022

6.6

2000

7.3

2009

8.5

2011

7.1

2005

6.9

1939

7.6

1999

6.8

2004

6.1