The researchers found that bills from Washington had the highest prevalence of cocaine, about 95percentt.
Northern Nigeria, where Buhari comes from, has the highest prevalence of child marriage in the country.
Egypt now has the highest prevalence of the disease in the world.
Perhaps most surprising, the highest prevalence of drinking among pregnant women remains among college-educated, middle-aged women.
One of the countries of the region, Egypt, has by far the highest prevalence of this infection worldwide.
Egypt has the highest prevalence of the world hepatitis C virus (HCV) load.
The highest prevalence of hepatitis is an important risk factor contributing to development of HCCs.
Today, the highest prevalence of diabetes is in Tokelau, a territory of New Zealand in the South Pacific, where nearly forty per cent of adults are afflicted.
The UN children's agency, Unicef, says 15 of the 20 countries identified as having the highest prevalence of child marriage are in Africa.
South Africa has the sixth highest prevalence of HIV in the world, according to UN Aids statistics, with almost one in five adults estimated to be infected.
It calculated that more than 4% of North Korea's population is enslaved, with Uzbekistan and Qatar the other countries with the highest prevalence of modern slavery per capita.
