CREATE TABLE table_202_28 (id DECIMAL, "year" DECIMAL, "output growth rate %" DECIMAL, "unemployment rate %" DECIMAL, "inflation rate %" DECIMAL)

what year had the highest unemployment rate ?
SELECT "year" FROM table_202_28 ORDER BY "unemployment rate %" DESC LIMIT 1
SELECT "year" FROM "table_202_28" ORDER BY "unemployment rate %" DESC NULLS LAST LIMIT 1