2001

7.1

2021

6.3

1990

6.7

2020

6.8

2011

5.2

2009

8.7

1955

6.4

1964

7.4

1998

6.9

2009

5.3

2003

7.0

2025

6.7

1985

6.4

1983

5.8

2012

6.5

2010

5.9

2010

6.3

2007

6.3

2017

6.0

2013

6.1