When was Mount Tahoma established? 
CREATE TABLE "high_schools_grades_9_12" (
  "high_school" text,
  "type" text,
  "established" real,
  "enrollment" real,
  "mascot" text,
  "wiaa_classification" text,
  "notes" text
);
SELECT MAX("established") FROM "high_schools_grades_9_12" WHERE "high_school"='Mount Tahoma';