CREATE TABLE table_204_229 (id DECIMAL, "property" TEXT, "test method" TEXT, "units" TEXT, "4275" TEXT, "4301" TEXT, "4435" TEXT, "4630" TEXT, "4645" TEXT)

how many times does mpa -lrb- kpsi -rrb- appear under the units column ?
SELECT COUNT(*) FROM table_204_229 WHERE "units" = 'mpa (kpsi)'
SELECT COUNT(*) FROM "table_204_229" WHERE "units" = 'mpa (kpsi)'