In the first six months of 1991, Europe's heroin seizures totaled about 1,870 pounds.

Although Colombian heroin represents 30 percent of all heroin seizures by the drug agency nationwide, its market share is believed to be considerably less.

An official Government report says 70,000 drug addicts have been registered throughout China, and heroin seizures tripled last year and are running even higher this year.

The previous record for a heroin seizure in Turkey was about three tons, discovered aboard a ship five years ago.

Customs officers at Dover have made the biggest ever heroin seizure in Britain; it's sixty kilos with a street value of ten million pounds.

And while seizures of marijuana, cocaine and hallucinogens rose, heroin seizures declined.

By 1987 the street value of cocaine seized by Customs in the United Kingdom reached £54,000,000 while the figures for heroin seizures had risen to £17,000,000.

Worth an estimated $18 million on the street, it was the largest heroin seizure ever in Germany, officials said.

Sometimes this sum became exceptionally great, as when a major heroin seizure occurred.

In the Ivory Coast, the first heroin seizures at Abidjan's airport took place last year when customs officials took a total of 36 pounds.