A 1989 UN report states that in the 21st century these islands in the South Pacific will disappear under the sea, unless action is taken to stop global warming. The economy depends on a tuna cannery and the sale of fishing licenses, postage stamps, and coins; a catamaran link between the atolls has increased tourist potential. Its small size and economic fragility make independence unlikely, but in 1996 it gained the right to enact its own internal legislation, and since 2001 the local authorities have had full control of the island's public services. Nearly 4000 Tokelauans live in New Zealand.