1936

8.3

1963

7.4

2000

8.0

1967

7.7

1952

7.7

1999

8.4

2003

6.1

2011

7.1

2006

7.0

1957

8.5

1982

7.8

1990

6.1

1928

7.9

1948

8.2

1990

7.4

2009

7.7

2003

7.4

2004

7.9

1973

6.5

1950

8.0