2001

7.8

1997

6.5

2003

6.5

1977

1.0

2007

0.0

1996

6.2

2004

6.2

2005

6.2

1963

5.7

2000

5.3

2007

7.5

1978

3.2

1957

7.7

1973

6.9

1998

6.2

1995

6.5

1962

6.9

2000

4.8

1964

7.9

1957

5.6

1974

7.6

1994

7.1