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The following conventions are used:
- = none or negligible
... = not available
$ = US dollar
"1988-1990" = the average for three years 1988, 1989
and 1990
"1992/93" = a crop, marketing or fiscal year
Production is given on a calendar-year basis for those crops (e.g. rice, tea and rubber) for which the original data are reported by calendar year. In the case of other crops, a split year (e.g. 1993/94) is used. This refers either to a general harvest period running from the Northern Hemisphere spring or summer of the first year stated through the first part of the second year stated, or to a special crop year for the commodity in question (e.g. August-July for cotton, or July-June for jute, kenaf and allied fibres).
Exports and imports are shown for the calendar year stated unless otherwise specified. Percentage changes and annual rates of change have been calculated from unrounded figures. The metric system is used unless otherwise stated. Data for 1993 and 1992/93 are preliminary estimates or forecasts and are subject to revision.
Grouping of countries
In addition to World totals, most tables include subtotals for regions and other groups of countries used for FAO's analytical studies. The European Community (EC) comprises: Belgium-Luxembourg, Denmark, France, Germany, Greece, Ireland, Italy, Netherlands, Portugal, Spain and United Kingdom. Data for the countries of Albania, Bulgaria, Hungary, the Czech Republic, Poland, Romania and the Slovak Republic are also aggregated to form an Eastern Europe sub-total within the region of Europe. Other details of the geographical coverage of the economic classes and regions used in this publication are to be found in the FAO Trade Yearbook 1991.
For trade data, totals include total imports or exports of each country irrespective of destination, that is to say, they also include goods imported from, or exported to, countries belonging to the same country group. Consequently, these totals are not to be taken as the net trade of the geographical groups to which they belong.
Differences between figures given for total exports and total imports of any one commodity may be due to several factors, for instance: the timelag between the dispatch of goods from the exporting country and their arrival in the importing country; the use of a different classification of the same product by different countries; or the fact that some countries supply data on general trade while others base data on special trade. In addition, total values of exports and imports differ because exports are generally valued at the point of export (f.o.b.) and imports include insurance and freight to the point of import (c.i.f.).
Figures in statistical tables may not add up because of rounding.