1956

5.6

1971

7.1

2004

7.0

1998

6.9

2002

7.3

1995

7.3

2006

7.2

1944

7.5

1927

7.8

1946

5.9

1994

6.7

1995

7.4

2007

7.3

1975

0.0

2008

6.2

1992

7.2

1999

6.6

1991

7.4

1981

9.0

1992

7.4