Name the year for guillermo cañas
CREATE TABLE "singles_26_16_titles_10_runners_up" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "opponent_in_the_final" text,
  "score_in_the_final" text
);
SELECT "year" FROM "singles_26_16_titles_10_runners_up" WHERE "opponent_in_the_final"='Guillermo Cañas';