1992 7.9

1992 7.1

1991 7.4

1991 6.7

1991 5.8

1990 7.1

1990 7.5

1990 3.3

1990 6.9

1989 7.5

1989 7.5

1989 7.8

1989 7.2

1989 6.8

1989 6.4

1989 7.1

1989 6.5

1989 7.5

1988 8.5

1988 6.1