2000

6.4

2001

7.8

2005

7.0

1949

4.0

2002

6.5

1991

7.3

2005

6.2

1963

8.1

1957

7.2

1997

5.7

2003

7.2

2006

6.6

2013

4.4

1981

6.5

2013

0.0

1969

7.5

1999

7.0

1939

7.4

2014

5.0

1957

7.2