2003

6.0

2006

6.1

1974

6.6

1991

5.7

1980

8.4

1962

7.8

2012

7.0

2013

6.6

1990

6.0

1989

8.4

1945

7.2

1930

6.8

1988

6.5

1960

8.0

1956

7.2

1999

4.9

1961

7.4

2010

5.9

1993

6.5

1982

5.4