According to data published by the United Nations in 1998, 21 million people worldwide suffered from cocaine or heroin addiction, and another 30 million from the abuse of amphetamine-type stimulants.

• 据1998年联合国有关资料显示：全世界有2100万人遭受可卡因和海洛因之害，有3000万人因滥用苯丙胺类兴奋剂而受害。