1997

6.3

6.1

1996

6.5

2021

5.7

1994

8.9

1974

6.4

2011

7.2

2025

7.8

1994

7.6

2002

4.7

2020

6.9

2014

4.0

2005

2.5

2003

9.0

1940

6.0

2008

6.2

2017

9.5

1965

6.5

2012

5.7

2014

7.0