2005

7.1

2013

5.5

1981

10.0

1988

0.0

1991

0.0

1992

5.7

2001

7.8

2004

7.3

1971

7.4

1917

5.0

1980

7.0

1984

5.9

2007

5.0

1968

7.6

1976

6.2

1962

4.8

2008

6.3

1995

5.9

1963

0.0

1988

8.0