| Data sources and definitions (2006 triennial review of the list of Least Developed Countries) |
Gross national income per capita
Gross national income (GNI) per capita
GNI per capita is equal to the gross domestic product (GDP) less primary incomes payable to non-resident units plus primary incomes receivable from non-resident units. Values are expressed in current United States dollars, calculated according to the World Bank Atlas method and reflect an unweighted average of three years (2000, 2001 and 2002 for the 2006 triennial review).
Percentage of population undernourished Indicates the prevalence of undernourishment in total population, that is to say, proportion of the population whose dietary consumption continuously fall below an established minimum dietary energy requirement for maintaining a healthy life and carrying out a light physical activity.
Probability of dying between birth and exact age 5. It is expressed as deaths per 1,000 births.
Gross secondary school enrolment ratio Number of pupils enrolled in secondary schools, regardless of age, expressed as a percentage of the population in the theoretical age group for the same level of education.
Number of literate persons aged fifteen and above, expressed as a percentage of the total population aged fifteen and above. A person is considered literate if he/she can read and write with understanding a simple statement related to his/her daily life.
Economic Vulnerability Index (EVI)
De facto population in a country as of 1 July of the year indicated.
Merchandise export concentration The numbers are Hirschmann indexes derived from 239 three-digit SITC, Revision 2 product categories.
Share of agriculture, forestry and fisheries in GDP The statistical series "agriculture, hunting, forestry and fishing as percentages of GDP" is generated from national accounts value added at current prices (in United States dollars).
Homelessness due to natural disasters Homelessness is defined as "people needing immediate assistance for shelter after a natural disaster", where a disaster is defined as "a situation or event, which overwhelms local capacity, necessitating a request to national or international level for external assistance; an unforeseen and often sudden event that causes great damage, destruction and human suffering". The statistical series used in the calculations is the "number of homeless due to natural disasters during the period 1990-2004" expressed as a percentage of population in 1997. For countries with missing data, available data on the total number of persons affected by natural disasters were used to estimate the homelessness.
Instability of agricultural production Consists of a measure of annual fluctuations of agricultural output from its trend value in each country. The instability index is calculated by regression of a trend equation for agricultural output and using the standard error of the regression as the indicator of instability.
Compiled from data on the value of merchandise exports (in current United States dollars expressed as index numbers) deflated by an index of import unit values. The result approximates a measure commonly referred to as the purchasing power of exports, which is an indicator of the country's capacity to import goods and services from current export earnings. The instability index is calculated by regression of a trend equation for exports (deflated by import unit values) and using the standard error of the regression as the indicator of instability.
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