2010

5.7

1988

6.2

2013

6.9

1979

8.1

1964

7.3

1997

8.3

2004

5.9

1987

6.5

2002

6.0

2012

6.9

2007

7.2

2012

6.9

1964

7.5

2013

8.1

2013

7.2

1960

7.6

2003

7.0

2006

6.7

2002

7.1

1993

6.7