2000

5.4

1967

6.0

1993

7.4

2010

5.5

2011

6.2

1995

6.2

1990

6.7

2006

6.9

2002

6.7

2016

6.7

2016

6.8

2011

7.1

2012

6.2

1979

6.6

2007

4.9

1952

7.2

1971

7.0

1994

7.6

1955

7.3

1988

6.6