1967

7.0

2004

7.4

2005

6.1

1973

8.5

1993

6.6

2007

6.7

2006

6.9

1946

7.6

1976

8.0

1987

6.3

2003

6.6

1978

6.6

1987

6.7

2003

6.3

1982

5.4

2008

6.7

2008

6.8

1972

8.0

2007

6.2

1963

7.7