1986

4.7

1973

5.5

1977

4.1

1975

1.0

1984

6.2

1988

5.8

1981

4.0

1984

4.8

1985

1.0

1989

4.4

1990

5.1

1961

4.5

1986

3.7

1987

5.9

1981

5.8

1980

6.8

1985

5.4

1974

4.3

1966

7.0

1971

6.1

1975

0.0

1988

5.0