1958

7.6

1984

8.0

1998

7.4

1957

8.5

1966

7.7

1932

0.0

1940

5.2

2001

7.5

1993

7.4

1989

7.2

1996

6.8

2006

8.2

1962

7.9

1999

6.8

2006

6.9

1962

5.8

1996

5.8

1992

7.3

2001

6.7

1982

7.6