Exhibit 4. U.S. Domestic Exports by Top Ten
        Three-digit NAICS Codes - 2010

  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)                           1,277,504      100.0    372,902        29.2    859,873         67.3     44,729          3.1
  Domestic Exports                            1,122,131       87.8    314,489        28.0    763,006         68.0     44,636          3.5
   Exports (Descending order, by value of related-party imports)
  Top Ten Total                                 832,968       65.2    269,041        32.3    551,847         66.3     12,080          1.5
  Chemicals                                     171,526       13.4     64,548        37.6    106,059         61.8        919          0.6
  Transportation Equipment                      175,827       13.8     55,400        31.5    117,688         66.9      2,739          1.4
  Computer & Electronic Products                120,950        9.5     42,689        35.3     76,604         63.3      1,657          1.4
  Machinery, Except Electrical                  125,853        9.9     32,301        25.7     91,814         73.0      1,738          1.4
  Petroleum & Coal Products                      60,793        4.8     23,101        38.0     37,653         61.9         39          0.1
  Miscellaneous Manufactured Commodities         39,370        3.1     13,668        34.7     24,807         63.0        895          2.3
  Electrical Equipment, Appliances & Compone     30,914        2.4     10,494        33.9     19,369         62.7      1,051          0.8
  Food & Kindred Products                        50,901        4.0      9,236        18.1     41,253         81.0        412          3.3
  Fabricated Metal Products, Nesoi               32,629        2.6      8,995        27.6     21,967         67.3      1,666          4.1
  Plastics & Rubber Products                     24,206        1.9      8,609        35.6     14,633         60.5        964          5.0
  Re-exports                                    155,373       12.2     58,413        37.6     96,867         62.3         93          0.1

  (1) Related-party indicator was missing from documentation.
  (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 8, of this release or at www.census.gov/foreign-trade/Press-Release/related_party/index.html.