1961

7.5

2007

4.5

1964

6.8

1983

7.1

2000

6.3

2002

6.8

1983

5.7

2008

0.0

1947

6.3

1946

7.0

1932

5.0

1988

6.6

1960

8.2

1930

6.1

1938

5.3

1982

6.9

2002

4.9

1984

6.3

1987

5.3

1988

6.4