1967

7.3

1972

6.2

1993

7.4

1947

6.5

1950

8.3

1978

7.4

1996

8.0

1987

7.1

1997

7.6

2004

6.6

1991

7.3

2004

6.3

1962

7.6

1989

6.9

2003

5.8

2002

7.3

2004

7.2

1973

9.0

1972

0.0

1952

5.7