6.6

2014

6.6

2004

7.1

2006

5.9

1971

6.0

2013

6.6

7.0

2010

7.9

2012

6.0

1974

6.4

1997

4.4

2005

7.7

2008

6.7

2019

7.7

2011

7.8

2024

6.0

2024

6.5

2004

7.3

1990

5.8

2010

7.3