27.2. Use of SITC for dissemination and analysis. The history of SITC is described in IMTS 2010 and is not reproduced here. It should be recalled, however, that in 1999, the Statistical Commission, at its thirteenth session, recognized that there would be a continuing need by users for international trade statistics analysed according to SITC, and IMTS 2010 (para. 3.19) recommended that, in addition to HS, countries use SITC for the dissemination and the analysis of trade statistics according to user requirements. The majority of countries and international organizations continue to use SITC for various purposes, such as market research and study of long-term trends in international merchandise trade.
UNCTAD product groups based on SITC, Rev.3a
In macroeconomic research and analysis, SITC is further aggregated into two broad commodity groups: primary commodities, precious stones and non-monetary gold; and manufactured goods. This is done to monitor the economic development of a country which normally starts by exporting mainly primary commodities, then moves up into commodities with higher value added (manufactured goods). However, for some countries with a high proportion of fuels exports in their total trade, it is necessary to exclude fuels in the analysis, in order to better monitor real economic development. In addition to those two broad groups, more detailed groups are created owing to special analytical interests, such as iron and steel (as an indication of construction activities), agricultural raw materials (normally used as intermediate inputs in various industries) and textile fibres, yarn, fabrics and clothing (important manufactured goods exported by developing economies). Other groups that do not fit within the main structure are attached as memorandum items.
− Total all products
 See Official Records of the Economic and Social Council, 1999, Supplement No. 4 (E/1999/24), Chapter II, para. 24 (c).