2005

6.6

1947

6.4

1977

0.0

1983

5.8

2007

6.5

2003

7.2

2004

7.8

1997

6.5

2005

5.4

2002

7.4

2001

6.7

2006

6.7

1983

7.2

1962

7.6

1967

7.0

2000

6.1

1972

6.9

1969

6.6

2007

6.2

1973

5.2