1988

5.5

1992

5.7

1994

6.6

1994

4.3

1984

7.1

1980

6.4

1990

2.7

1990

6.4

1986

5.6

1984

5.6

1986

6.1

1992

0.0

1984

7.4

1990

4.2

1993

0.0

1989

6.7

1982

6.9

1990

5.3

1992

5.0

1984

5.7

1974

5.6

1984

7.7

1985

6.6

1986

6.2