CREATE TABLE table_18889 ("Region/country" TEXT, "1985-1990" TEXT, "1990-1995" TEXT, "1995-2000" TEXT, "2000-2005" TEXT)

what's the region/country with 2000-2005 being 2.61
SELECT "Region/country" FROM table_18889 WHERE "2000-2005" = '2.61'
SELECT "Region/country" FROM "table_18889" WHERE "2000-2005" = '2.61'