The amount of money involved is hard to gauge, but the amount of funds remitted annually by migrant workers to their families in their home country is generally accepted as an indicator as much is transferred in this way.
所涉金额很难估量，但通常接受的做法是，将移徙工人每年向其在原籍国的家人汇去的资金作为衡量用这种方法转让的数额的一个指标。