CREATE TABLE table_21936 ("Name or route" CLOB, "type" CLOB, "elevation groundstation" FLOAT, "elevation mountainstation" FLOAT, "slope length" FLOAT, "capacity in persons/hour" FLOAT, "construction year ( s ) " CLOB)

Name the least capacity for persons hour for 1983
SELECT MIN("capacity in persons/hour") FROM table_21936 WHERE "construction year(s)" = '1983'
SELECT MIN("capacity in persons/hour") FROM "table_21936" WHERE "construction year(s)" = '1983'