Name the total number of step 6 for 11 gs grade
CREATE TABLE "base_salary" (
  "gs_grade" real,
  "step_1" text,
  "step_2" text,
  "step_3" text,
  "step_4" text,
  "step_5" text,
  "step_6" text,
  "step_7" text,
  "step_8" text,
  "step_9" text,
  "step_10" text
);
SELECT COUNT("step_6") FROM "base_salary" WHERE "gs_grade"=11;