1940

7.3

1961

7.7

1976

6.4

1971

7.1

2001

7.8

2005

7.4

1994

7.0

1998

6.6

1963

7.7

1993

6.3

1999

6.9

1966

7.3

1983

5.8

1958

8.0

1999

7.0