In 1994, transactions totalling 13.8 billion Hong Kong dollars ($US 1.8 million) were reported by banks in Hong Kong as being 'suspicious'. This voluntary reporting system is considered to only uncover a fraction of the illicit money travelling through the territory. The vast majority of the such funds can be construed as money laundering from other Asian countries. It is reported that a substantial amount comes from payoffs to officials as part of large infrastructure projects in South-east Asian countries.