1993

6.8

2011

7.5

2003

6.2

1984

6.5

2014

5.4

2013

6.1

2012

6.5

6.3

2024

8.1

2022

7.6

2021

5.7

2012

6.3

2020

6.0

2016

7.4

1964

7.4

2017

5.1

2022

6.3

2013

6.1