public Object getValueAt(int row, int column) {
            if ((row < getRowCount()) && (column < getColumnCount())
                && (row >= 0) && (column >= 0)) {
                switch (column) {
                case StatisticsModel.NAME_COLUMN:
                    return data[NAME_COLUMN][row];
                case StatisticsModel.VALUE_COLUMN:
                    return data[VALUE_COLUMN][row];
                }
            }
            return null;
        }