1984

0.0

1966

0.0

1981

5.5

1969

6.4

1977

4.5

1971

5.4

1974

0.0

1990

7.4

1999

7.9

1988

7.0

1968

5.2

1969

6.1

2006

4.2

1963

7.2

1979

6.6

1969

3.8

1978

7.5