In part B of Tables 2a and 2b in the U.S. International Transactions Accounts (ITAs), why have seasonally adjusted data for countries and areas been replaced with "n.a." (not available)?

With the release of the new presentation of the ITAs on June 18, 2014, BEA introduced a new presentation of seasonally adjusted trade in goods for selected countries and areas in Table 2.2. The data in Table 2.2 are based on a new methodology developed jointly by BEA and the U.S. Census Bureau to directly seasonally adjust trade data by country or geographic area rather than indirectly by commodity groups, as was done for part B of Tables 2a and 2b in the old presentation of the ITAs. For more information, see www.bea.gov/newsreleases/international/trade/2014/pdf/trad_geo_FAQs.pdf.