2001

2.0

1974

6.3

1972

5.8

1985

2.0

1993

6.1

1990

5.4

1977

6.8

1989

0.0

1969

7.0

1983

5.9

1979

4.9

1975

5.5

1986

5.2

1987

5.9

1991

6.9

1986

6.5

1982

6.2

1971

7.4