2013

5.9

7.8

1898

5.8

1960

6.4

2012

9.1

2007

6.6

1993

6.1

1981

6.9

1964

7.9

2013

6.6

1970

6.0

1957

7.0

1969

6.7

2010

6.7

2012

6.2

2009

6.8

1975

8.0

1964

6.1

2014

6.6

1990

7.5