1969

5.9

1989

6.0

2015

7.7

1963

7.9

1985

9.2

1972

7.1

1987

7.8

1979

6.8

1957

0.0

1981

0.0

1969

0.0

1972

6.4

1991

6.6

1993

6.7

1991

6.2

2008

7.7

1958

7.0