1981

5.2

1996

6.5

2000

0.0

2001

10.0

1980

6.2

1995

5.8

1984

6.9

1999

2.5

1994

1.0

1964

7.0

1983

10.0

2001

5.5

1995

6.0

1983

0.0

2006

5.0

1977

7.5

1970

6.2

1995

0.0

1983

1.0

1999

5.5

2003

6.7

1985

6.1

2000

6.0

1999

0.0