2010

5.8

2001

8.4

1965

6.7

1993

5.3

2006

5.5

1979

6.1

2000

7.8

2007

7.0

2005

6.6

2009

6.8

2004

6.6

2012

7.0

2014

7.0

1991

6.6

1997

6.1

2015

7.5

2006

7.4

2006

6.5

1974

8.6

2011

5.1