1994

5.9

1952

7.7

2000

6.6

2009

5.3

2000

7.2

1997

6.2

2005

5.5

1990

6.9

1982

7.9

1999

5.8

1950

6.8

1991

6.7

2008

4.5

1976

6.5

1988

6.5

1994

7.5

1991

6.8

1974

6.8

1966

5.7

1988

5.7