Their experimentation with drugs, for example, was so widespread that as of the mid - 1990 ’ s, the illegal drug trade was worth an estimated $500 billion a year, making it, as one source says, “the single most lucrative business sector in the world. ”
एका सूत्रानुसार, तो “जगातल्या व्यापारी क्षेत्रात सर्वाधिक नफा मिळवून देणारा एकमेव उद्योग होता. ”