CREATE TABLE table_31852 ("Model" CLOB, "Build year" CLOB, "Top speed  ( In operation )  \\uff08km/h\\uff09" FLOAT, "Power output \\uff08kW\\uff09" CLOB, "Total production" FLOAT)

Tell me the build year for total production of 150
SELECT "Build year" FROM table_31852 WHERE "Total production" = '150'
SELECT "Build year" FROM "table_31852" WHERE "Total production" = '150'