How many catagories for denominations does Austria have? 
CREATE TABLE "table1_2592308_1" (
  "country" text,
  "name_of_bullion_coin" text,
  "fineness" text,
  "denominations_gold_weight" text,
  "years_of_mintage" text
);
SELECT COUNT("denominations_gold_weight") FROM "table1_2592308_1" WHERE "country"='Austria';