what is the typhoid fever number for the year 1929
CREATE TABLE "incidence_of_disease_in_russian_empire_a" (
  "year" text,
  "typhus" real,
  "typhoid_fever" real,
  "relapsing_fever" real,
  "smallpox" real,
  "malaria" text
);
SELECT "typhoid_fever" FROM "incidence_of_disease_in_russian_empire_a" WHERE "year"='1929';