According to legend,

An Ethiopian goatherd skipped around after eating coffee cherries when he saw his goats doing the same. Coffee was a simple food and beverage for African tribesmen. Now, it is sold in large quantities worldwide. It is one of the top in value in trade. All coffee-exporting countries depend on coffee as the main income. Many people depend on it for their living. Many drink coffee a lot. In 1975, a frost killed almost half of Brazil’s coffee trees which changed the prices drastically. In 1979, frost hit Brazil again. Every tree lost result in no income for three to five years. The income loss is huge considering 15 million trees were lost. Brazil had to stop exporting coffee. Importers bought it in bulk afraid of shortage. Prices increased and farmers planted more. Coffee was abundant and prices fell. Farmers began planting other crops. Producers and consumers have limited production to what the market can absorb, have a reserve and sell at agreeable prices.