What is the maximum Credibility/Capital to Assets Ration (Score) that has a Credibility/Capital to Assets Ration (%) bigger than 4.66, and the Banking Power/Capital Base ($ Million) is less than 2,550?
CREATE TABLE "top_5_iranian_banks_2012_ranking" (
  "bank" text,
  "score_iran" real,
  "score_global" real,
  "banking_power_capital_base_million" real,
  "banking_power_capital_base_pct_change" text,
  "total_assets_million" real,
  "total_assets_score" real,
  "total_assets_pct_change" text,
  "credibility_capital_to_assets_ratio_pct" real,
  "credibility_capital_to_assets_ratio_score" real,
  "performance_return_on_capital_pct" real,
  "performance_return_on_capital_score" real,
  "return_on_assets_pct" real,
  "return_on_assets_score" real
);
SELECT MAX("credibility_capital_to_assets_ratio_score") FROM "top_5_iranian_banks_2012_ranking" WHERE "credibility_capital_to_assets_ratio_pct">4.66 AND "banking_power_capital_base_million"<'2,550';