1939

7.6

1993

7.8

1959

7.8

1965

6.3

2006

5.9

1999

6.7

1965

6.8

1967

6.7

1943

0.0

1937

5.8

1994

6.6

1990

6.1

1962

7.3

1962

7.0

2003

5.2

2002

5.9

2007

7.1

1944

6.5

1989

5.7

2004

7.0