ANSWER TO FRAME 15.
1983
372/400
X 100
=
93
1984
388/400
X 100
=
97
1985
400/400
X 100
=
100
1986
420/400
X 100
=
105
1987
424/400
X 100
=
106
1988
460/400
X 100
=
115
1989
468/400
X 100
=
117
22
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