1999

6.8

1992

7.7

2001

7.5

1945

7.7

1993

6.7

2005

6.9

1994

7.0

2006

7.1

2006

7.3

2007

6.1

1967

6.4

1991

6.8

2017

8.8

2008

7.0

1971

5.7

1991

4.9

1945

7.6

1949

7.0

1994

6.0

1966

7.3