1954

7.9

1961

7.5

1997

5.8

1989

6.3

1980

7.7

1996

7.6

1988

7.1

2001

7.4

1955

7.2

2004

7.3

1987

6.5

1997

7.0

1990

8.5

1995

7.3

1959

7.3

1928

7.0

1962

7.5

1938

7.5

1967

7.7

1987

6.5