1941

6.8

1980

6.0

1987

7.2

2005

3.0

1993

5.7

2008

7.8

1989

0.0

2005

6.6

1963

0.0

1980

5.5

1981

10.0

1981

0.0

1983

5.0

2006

6.0

2007

10.0

1994

6.0

2005

4.2

1977

6.5

2009

7.0

1994

5.6

1942

7.0

1975

5.8

1984

8.0

1954

6.2

2000

7.0

1958

6.1

1977

4.3