on: the proportion of,
say, defense expenditures as a percent of GNP/GDP in local currency
accounts may differ substantially from the proportion when GNP/GDP
accounts are expressed in PPP terms, as, for example, when an observer
estimates the dollar level of Soviet or Japanese military expenditures;
similar problems exist when components are expressed in dollars under
currency exchange rate procedures. Finally, as academic research
moves forward on the PPP method, we hope to convert all GNP/GDP
estimates to this method in future editions of the Factbook.

_#_Growth rate (population): The annual percent change in the
population, resulting from a surplus (or deficit) of births over
deaths and the balance of migrants entering and leaving a country.
The rate may be positive or negative.

_#_Illicit drugs: There are five categories of illicit
drugs--narcotics, stimulants, depressants (sedatives), hallucinogens,
and cannabis. These categories include many drugs legally produced and
prescribed by doctors as well as those illegally produced and sold
outside medical channels.

Cannabis (Cannabis sativa) is the common hemp plant, provides
hallucinogens with some sedative properties, and includes marijuana (pot,
Acapulco gold, grass, reefer), tetrahydrocannabinol (THC, Marinol),
hashish (hash), and hashish oil (hash oil).

Coca (Erythroxylon coca) is a bush and the leaves contain the stimulant
cocaine. Coca is not to be confused with cocoa which comes from cacao
seeds and is used in making chocolate, cocoa, and cocoa butter.

Cocaine is a stimulant derived from the leaves of the coca bush.

Depressants (sedatives) are drugs that reduce tension and anxiety and
include chloral hydrate, barbiturates (Amytal, Nembutal, Seconal,
phenobarbital), benzodiazepines (Librium, Valium), methaqualone
(Quaalude), glutethimide (Doriden), and others (Equanil, Placidyl,
Valmid).

Drugs are any chemical substances that effect a physical, mental,
emotional, or behavioral change in an individual.

Drug abuse is the use of any licit or illicit chemical substance that
results in physical, mental, emotional, or behavioral impairment in an
individual.

Hallucinogens are drugs that affect sensation, thinking,
self-awareness, and emotion. Hallucinogens include LSD (acid, microdot),
mescaline and peyote (mexc, buttons, cactus), amphetamine variants (PMA,
STP, DOB), phencyclidine (PCP, angel dust, hog), phencyclidine