As of February 2004, Yemen is divided into twenty governorates (muhafazat) and one municipality called "Amanat Al-Asemah" (the latter containing the capital, Sana'a)
The population of Yemen was about 28 million according to July 2005 estimates, with 46% of the population being under 15 years old and 2.7% above 65 years. In 1950, it was 4.3 million. By 2050, the population is estimated to increase to about 60 million.
Yemen has one of the world's highest birth rates; the average Yemeni woman bears five children. Although this is similar to the rate in Somalia to the south, it is roughly twice as high as that of Saudi Arabia and nearly three times as high as those in the more modernized Persian Gulf states. Yemen's population is increasing by 700,000 every year.
The modern Republic of Yemen was born in 1990 when traditionalist North Yemen and Marxist South Yemen merged after years of border wars and skirmishes. But the peace broke down in 1994 and a short civil war ended in defeat for separatist southerners and the survival of the unified Yemen.
Since unification Yemen has been modernising and opening up to the world, but it still maintains much of its tribal character and old ways. Tensions persist between the north and the south; some southerners say the northern part of the state is economically privileged.