1976

5.0

2004

7.9

2021

7.5

2019

6.7

2003

6.2

2014

6.1

2005

6.9

2002

7.5

2010

8.2

2009

7.3

1989

5.2

2013

7.2

2013

7.6

2013

6.1

2005

6.3

1993

7.5

2008

7.6

2008

6.7

2002

6.7

2003

5.7