Agriculture has always played a very important role in Cuba's economy. The country's fertile plains and tropical climate are excellent for citrus, tobacco, and sugar production. Cuba also has fertile, mountainous zones where coffee is produced. Some 2,600,000 people, or 23 percent of the labor force, are employed in agriculture. The most important crops have always been sugar and tobacco, but Cuba also produces coffee, potatoes, tomatoes, rice, beans, onions, and citrus fruits, though not in exportable quantities. Still, Cuba imports more than 60 percent of its agricultural food products.