25. The World Bank estimates that, in 2001, 1089 out of 6150 million human beings lived below the international poverty line, which it currently defines in terms of $32.74 PPP 1993 per month or $1.075 PPP 1993 per day (Shaohua Chen and Martin Ravallion, "How Have the World's Poorest Fared Since the Early 1980s?", World Bank Research Observer, 2004, Vol. 19, No. 2, pp. 147-153.).
