1979

9.8

1957

0.0

1994

6.6

1995

7.3

2005

6.6

0.0

2005

6.8

1987

5.5

1977

3.0

1982

5.8

1983

7.1

1985

5.7

1991

5.8

2002

5.7

1957

7.1

1998

6.6

0.0

2003

7.1

2006

6.3

2006

7.2