2007

6.7

1952

6.7

1974

6.4

2011

6.9

1993

5.0

2012

6.3

2001

4.9

1960

7.8

1965

6.8

1970

6.3

2000

5.1

2004

6.8

1996

5.8

1956

7.1

1988

7.1

1998

6.0

2017

4.5

1988

6.5

1991

4.7

1990

6.8