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Calculation

                             The process of calculation is done in 4 steps:

                             - Step 1: Calculating shipment index of each commodity

                             Formula:

                                                           T
                                                     i =     1 n   100
                                                      tn
                                                           T n 0
                             Where:

                             itn: Shipment index of commodity n;

                             Tn1: Quantity of commodity n consumed at reference time;

                             Tn0:  Quantity of commodity n consumed at base time.
                             - Step 2: Calculating shipment index of VSIC 4-digit industries


                             Formula:
                                                             i  d
                                                    I tN 4  =   tn  tn
                                                               d
                                                              tn

                             Where:
                             ItN4: Shipment index of VSIC 4-digit industry;

                             itn: Shipment index of commodity n   in VSIC 4-digit industries;
                                                                  th
                             dtn: Weight of commodity n.

                             Weight of commodity is the value of net turnover of commodity
                        of shipment at base year of 2010.

                             - Step 3: Calculating shipment index of VSIC 2-digit industries.

                             Formula:

                                                            I   d
                                                   I tN 2  =   tN 4  tN 4
                                                               d
                                                             tN  4
                             Where:

                             ItN2: Shipment index of VSIC 2-digit industry;


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