This is happening because you're not dereferencing an array.
Maybe something like:
use strict;
use warnings;
use Data::Dumper;
# This will give you a clearer idea of what you data actually looks li
+ke
print Dumper($AoH);
# This assumes that $data is an index (integer)
my $year = $AoH->[$data]{'YEAR'};
If this doesn't work for you, post the contents of the Data::Dumper output, and we'll talk some more.
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