Only two other countries in Africa reported on trends in heroin consumption: Zimbabwe, where use was stable, and Nigeria, where there had been some decrease in the use of heroin.
只有另外两个非洲国家报告了海洛因消费趋势：津巴布韦，海洛因使用情况稳定；尼日利亚，海洛因使用略有减少。