Agriculture plays a very important part in Zambia’s economy providing many more jobs than the mining industry. A small number of white Zimbabwean farmers were welcomed into Zambia after their expulsion by Robert Mugabe, whose numbers had reached roughly 150 to 300 people as of 2004. They farm a variety of crops including tobacco, wheat, and chili peppers on an estimated 150 farms. The skills they brought, combined with general economic liberalisation under the late Zambian president Levy Mwanawasa, as been credited with stimulating an agricultural boom in Zambia. In 2004, for the first time in 26 years, Zambia exported more corn than it imported.