The summer solstice occurs in the northern hemisphere when the sun is at the most acute angle above the horizon. It usually occurs on or about June 21.
North Korea's economy is in a dire state. Analysts estimate per capita income is $1,000-$2,000 (Â£640-Â£1,280) per year. Compare that with South Korea, where per capita income is almost $20,000. That means that even at the higher end of the range, North Koreans make just 10% of what their average southern counterparts make. One estimate says it works out to about $4 a day. However, information coming out of North Korea is very unreliable and so the numbers could be much worse.
In the first official census, taken in 1949, the total population of South Korea was calculated at 20,188,641 people. The 1985 census total was 40,466,577. Population growth was slow, averaging about 1.1% annually during the period from 1949 to 1955, when the population registered at 21.5 million.