Exhibit 4. U.S. Domestic Exports by Top Ten
        Three-digit NAICS Codes - 2011

  In millions of dollars.  (Z) Represents zero or less than one half of measurement shown.

          NAICS Product Description           Total               Related                Nonrelated              Nonreported                   Party Trade(

                                               Value   Percent Of    Value   Percent Of C   Value   Percent Of Ca   Value   Percent Of Category  Total
   Exports Total(2)                           1,480,552      100.0    428,260        28.9  1,007,737         68.1     44,555          3.0
  Domestic Exports                            1,299,176       87.7    365,014        28.1    889,702         68.5     44,460          3.4
  Exports (Decending order, by value of related-party exports)
  Top Ten Total                                 954,158       64.4    312,252        32.7    628,982         65.9     12,924          1.4
  Chemicals                                     187,657       12.7     73,517        39.2    113,181         60.3        960          0.5
  Transportation Equipment                      200,735       13.6     65,533        32.6    132,410         66.0      2,792          1.4
  Computer & Electronic Products                123,463        8.3     40,614        32.9     80,993         65.6      1,856          1.5
  Petroleum & Coal Products                     100,318        6.8     40,237        40.1     60,040         59.8         42         (Z)
  Machinery, Except Electrical                  142,994        9.7     36,841        25.8    104,277         72.9      1,877          1.3
  Miscellaneous Manufactured Commodities         42,302        2.9     14,141        33.4     27,156         64.2      1,006          2.4
  Electrical Equipment, Appliances & Compone     34,142        2.3     11,483        33.6     21,542         63.1      1,117          3.3
  Food & Kindred Products                        58,668        4.0     10,364        17.7     47,858         81.6        446          0.8
  Plastics & Rubber Products                     27,133        1.8      9,892        36.5     16,222         59.8      1,019          3.8
  Fabricated Metal Products, Nesoi               36,744        2.5      9,631        26.2     25,304         68.9      1,809          4.9
  Re-exports                                    181,376       12.3     63,245        34.9    118,035         65.1         96          0.1

  (1) Related party indicators are not available for low value estimates and certain aggregated low value Canadian export transactions.
  (2) For definition, see Technical Documentation.
  NOTE:  This exhibit is compiled from detailed merchandise trade data.  For information on definitions, nonsampling errors and other data limitations
  refer to the technical documentation on page 9, of this release or at www.census.gov/foreign-trade/Press-Release/related_party/index.html.