1979

5.2

1970

0.0

1973

6.0

1991

7.8

1972

6.5

1978

4.5

1993

7.7

2012

7.1

1999

7.9

1976

5.0

1978

5.2

1998

7.4

1975

7.2

1973

0.0

1961

5.1

2006

6.8

1986

10.0

1999

8.7

1962

7.5

1975

0.0

1971

6.0