The Peruvian coca and cocaine industry is as huge as it is today because of advanced industrial nations’ demand for drugs. This high demand has created a framework of dependence on "coca-dollars" and on US drug policy. Money from cocaine trafficking feeds local economies, supports inflation, and even causes social changes such as cocaine smoking among indigenous Peruvians. Coca farming today is still a significant source of income for peasants, as it accounts for 48% of total net family income in the high coca-growing Apurímac River region. In an effort to reduce drug use in America, for the past 50 years the US government together with the United Nations have been waging a war on drugs. The US Drug Control Program maintains that "eliminating the cultivation of illicit coca and opium is the best approach to combating cocaine and heroin availability in the US."