2002

5.4

1997

5.6

2001

5.6

1993

6.7

2013

5.9

1999

6.8

1985

6.2

2001

7.3

2017

6.6

2025

6.0

2021

6.9

2007

5.8

2015

5.5

2015

7.1

2011

5.9

1967

6.2

2014

6.8

2018

4.8

1982

8.0

2024

8.6