what is the minimum student population where the research grants is 2.203?
CREATE TABLE "table1_216655_1" (
  "university" text,
  "established_as_a_university" real,
  "first_establishment" real,
  "student_population_fte_2009" real,
  "research_grants_2009_in_billion_sek" text
);
SELECT MIN("student_population_fte_2009") FROM "table1_216655_1" WHERE "research_grants_2009_in_billion_sek"='2.203';