2004

7.9

1977

7.1

1997

8.4

1979

7.0

1979

7.4

1987

7.6

2006

6.9

1969

0.0

1984

6.0

2007

7.6

2013

0.0

2008

7.8

1948

6.4

1992

6.5

1954

0.0

1962

7.0

2014

7.0

1996

7.2

2002

8.4

1993

8.6