1993

6.2

1940

7.1

1999

5.6

2002

6.0

1980

7.0

2008

6.3

1997

6.1

1990

4.5

2016

6.5

2012

5.3

2023

0.0

2015

6.3

2017

8.0

2013

6.3

2009

6.0

1988

4.7

2022

6.9

1968

6.3

2001

4.3

2024

6.7