The data are for 1997. The reference population, adopted by the WHO in 1983, is based on children from the United States, who are assumed to be well nourished. They include carbon dioxide produced during consumption of solid, liquid, and gas fuels and gas flaring. The data are for 1996. Deforested areas do not include areas logged but intended for regeneration or areas degraded by fuelwood gathering, acid precipitation, or forest fires.
Negative numbers indicate an increase in forest area.
It is calculated without making deductions for depreciation of fabricated assets or for depletion and degradation of natural resources. According to the 1993 SNA, net acquisitions of valuables are also considered capital formation. They include high-technology products such as in aerospace, computers, pharmaceuticals, scientific instruments, and electrical machinery. All host without a country code are assumed to be located in the United States. Net enrollment ratios exceeding 100 indicate discrepancies between the estimates of school-age population and reported enrollment data.