mean_transfer_efficiency = {
let totalMoneyTransfered = sum(
spending_data.map((transfer) => parseFloat(transfer["Money to Transfers"].replaceAll(",", "")))
);
let totalSpending = sum(
spending_data.map((transfer) => parseFloat(transfer["Total spending"].replaceAll(",", "")))
);
let efficiency = totalMoneyTransfered / totalSpending;
return efficiency;
}