public function get_aggregate_string() {

        $aggregate = $this->aggregate;
        $method = $this->settings->aggregationmethod;

        // Only display aggregate if aggregation method isn't COUNT.
        $aggregatestr = '';
        if (is_numeric($aggregate) && $method != RATING_AGGREGATE_COUNT) {
            if ($method != RATING_AGGREGATE_SUM && !$this->settings->scale->isnumeric) {

                // Round aggregate as we're using it as an index.
                $aggregatestr .= $this->settings->scale->scaleitems[round($aggregate)];
            } else { // Aggregation is SUM or the scale is numeric.
                $aggregatestr .= round($aggregate, 1);
            }
        }

        return $aggregatestr;
    }