2003

6.0

1993

5.3

2013

6.4

2001

5.2

1989

5.9

1974

7.7

2006

6.3

2008

6.9

2019

7.4

5.4

1999

7.6

2017

7.0

2019

6.8

2012

5.2

2010

6.8

2021

7.2

2018

6.5

1967

6.2

2024

7.7