2013

6.1

1995

9.0

2001

8.5

1972

8.7

1994

8.5

1994

8.7

1954

8.4

1993

8.0

2006

7.4

2007

8.1

1965

8.0

2009

8.0

1988

7.8

2011

6.9

1991

8.3

1954

8.5

1994

8.3

2001

7.9

1957

8.5

2014

7.7