1957

6.0

1952

6.9

1985

5.2

1984

4.0

1969

7.2

1971

5.0

1989

8.8

1972

0.0

1970

6.1

1986

3.7

1973

5.7

1970

6.3

1950

7.0

1955

5.8

1973

0.0

2004

9.3