 how many country with currency name being republika srpska dinar
CREATE TABLE "table1_13681_2" (
  "country" text,
  "currency_name" text,
  "month_with_highest_inflation_rate" text,
  "highest_monthly_inflation_rate" text,
  "equivalent_daily_inflation_rate" text,
  "time_required_for_prices_to_double" text
);
SELECT COUNT("country") FROM "table1_13681_2" WHERE "currency_name"='Republika Srpska dinar';