Korean reunification would differ from the German reunification precedent. In relative terms, North Korea's economy is currently in a far worse situation than that of East Germany in 1990. The income per capita ratio (PPP) was about 3:1 in Germany (US$25,000 for the West, about US$8,500 for the East). The ratio is around 22:1 in Korea (in 2015: US$37,600 for the South, US$1,700 for the North). While at the moment of German reunification the East German population (around 17 million) was about a third of West Germany's (more than 60 million), the North Korean population (around 25 million) is currently around half of South Korea's (around 51 million). In the event of Korean reunification, a flood of North Koreans to a much more developed South Korea may cause the country's economy to undergo a heavy burden that will cost upwards of US$1 trillion, possibly creating a period of economic collapse or stagnation.