2010

5.6

2012

7.7

1991

5.9

1997

6.1

1992

5.3

1985

7.4

2008

5.1

2006

5.5

1966

6.3

2001

6.6

2000

4.8

2010

5.3

1938

7.1

2008

6.4

2000

5.2

1989

5.7

1954

8.0

1955

6.0

2001

8.9

2007

7.4