2013

6.1

1999

6.3

2009

8.5

2011

6.2

2012

7.9

2021

5.6

1982

7.4

6.1

2020

6.0

2024

6.9

2007

6.6

2018

6.6

1971

6.0

2015

6.1

1994

6.8

2010

5.5

1975

4.2

2013

6.1

2005

10.0

2025

4.4