2003

6.3

2001

6.8

1952

6.2

1965

6.1

1964

6.2

1950

6.8

1964

6.3

1963

6.9

1964

6.6

1962

7.0

1953

6.6

1965

6.9

1954

5.4

1965

6.2

1966

6.3

1955

7.2

1965

6.7

1957

0.0

1948

7.0

1993

6.3