2008

7.2

1957

5.9

2009

6.9

2003

6.0

2002

7.6

2004

8.0

2000

8.2

2003

7.8

1985

6.9

1996

7.5

2005

7.0

1986

7.7

1987

7.3

1974

7.9

1963

7.6

1973

7.4

1998

5.5

2001

6.8

2004

7.6

1944

7.6