In 1989 what percent of the world's ivory seizure was found in America?

The ivory trade is the commercial, often illegal trade in the ivory tusks of the hippopotamus, walrus, narwhal,[1]mammoth,[2]and most commonly, Asian and African elephants.

Ivory has been traded for hundreds of years by people in such regions as Greenland, Alaska, and Siberia. The trade, in more recent times, has led to endangerment of species, resulting in restrictions and bans. Ivory was formerly used to make piano keys and other decorative items because of the white color it presents when processed but the piano industry abandoned ivory as a key covering material in the 1970s.