ABS Series 6457.0 International Trade Price Indexes contains indexes measuring changes in the prices paid for imports of merchandise that are landed in Australia each quarter and prices received for exports of merchandise that are shipped from Australia each quarter. The indexed are calculated on the reference base 1989-90=100 but as of September quarter 2012, all index numbers will be calculated on a new index reference period of 2011-12. This will result in the index numbers for each index series being reset to 100.0 for the financial year 2011-12. Sector AUWM index numbers are presented based on the Standard International Trade Classification. For index numbers based on Balance of Payments Broad Economic Categories, please see ALLX AUTP.