Nearly 90 per cent of Burundi's income comes from coffee, for instance.
But we're Christians, and the first thing we do every month is give at least 10 per cent of our income to charity.
Farmers faced losing 90 per cent of their income for the year if the plague was allowed to take hold, he warned.
During the 1990s about 900,000 signed up party members contributed 15 to 25 per cent of the parties' annual income.
Rather less, 24.2 per cent of their income, came from rates paid by ordinary householders.
That is only 7 per cent of the family's monthly income.
The Chinese are investing fifty per cent of their income, and they seem to be booming.
Today, tourism is estimated to account for 85 per cent of the islands' income.
This concession cost the order ten per cent of its yearly income.
The cable companies were expected to spend ten per cent of their income on a Community Channel.