Economy of North Korea
Estimating gross national product in North Korea is a difficult task because of a dearth of economic data and the problem of choosing an appropriate rate of exchange for the North Korean won, the nonconvertible North Korean currency. The South Korean government's estimate placed North Korea's GNP in 1991 at US$22.9 billion, or US$1,038 per capita. In contrast, South Korea posted US$237.9 billion of GNP and a per capita income of US$5,569 in 1991. North Korea's GNP in 1991 showed a 5.2% decline from 1989, and preliminary indications were that the decline would continue. South Korea's GNP, by contrast, expanded by 9.3% and 8.4%, respectively, in 1990 and 1991.
North Korean won
In 2009, another currency reform was initiated to tackle hyperinflation and black market activities. Unlike previous reforms, the 2009 move sparked a nationwide panic when it was announced there would be a two-week waiting period between the withdrawal of the old currency and the introduction of the new currency, coupled with an exchange limit of only 500,000 old won for each person, effectively wiping out savings. The state eventually pulled back on most exchange limits; however, the revaluation proved to be a failure.