2014

5.6

1986

6.0

2010

5.7

2012

7.8

1976

4.7

2009

7.7

1968

6.5

2004

8.0

2023

6.7

2005

7.8

6.1

2013

6.1

2012

7.4

1990

7.4

2010

7.8

1999

6.5

2000

4.8

2013

6.8

2009

6.2

1967

6.7