1955

7.7

1975

6.0

1955

6.6

1990

7.4

1969

3.7

1991

5.2

1952

6.4

1969

6.2

1993

7.7

1973

6.9

1992

6.0

1969

6.5

1997

7.6

1974

0.0

1971

7.1

1978

7.5

1989

7.2

1974

5.7

1963

4.7

1964

3.0

1996

5.0

1964

0.0

1991

6.0