CREATE TABLE table_19390 ("Country" TEXT, "Total" FLOAT, "4000ft+" FLOAT, "3500\\u20134000ft" FLOAT, "3000\\u20133500ft" FLOAT, "2500\\u20133000ft" FLOAT, "2000\\u20132500ft" FLOAT)

Name the most of 2500-3000ft
SELECT MAX("2500\u20133000ft") FROM table_19390
SELECT MAX("2500\u20133000ft") FROM "table_19390"