CREATE TABLE table_2188 ("Year" FLOAT, "Division" FLOAT, "League" TEXT, "Regular Season" TEXT, "Playoffs" TEXT, "Open Cup" TEXT)

When did the 4th, Midwest season happen?
SELECT "Year" FROM table_2188 WHERE "Regular Season" = '4th, Midwest'
SELECT "Year" FROM "table_2188" WHERE "Regular Season" = '4th, Midwest'