1998

7.4

1999

7.5

1945

7.7

1970

7.0

2007

6.2

1997

7.1

1939

7.6

2006

7.4

1998

0.0

1992

6.0

1996

6.5

2011

3.4

1997

6.5

1982

4.5

1969

0.0

1970

2.5

2005

5.9

2007

6.1

2008

3.5

1993

7.5