If donors claim that 42 percent of bilateral aid is untied, one can assume that the remaining 58 is tied. In 2004, total bilateral aid amounted to US$79.5 billion. In the worst-case scenario of OECD, the tying of aid can reduce its value by as much as 30 percent. If that was true in all cases, that translates into a US$13.9 billion reduced value of aid for the recipients. If the value on an average only is reduced by 20 percent, it would equal US$9.2 billion.