Vulnerability to natural disasters, as well as poverty and limited access to education are among Haiti's most serious disadvantages. Two-fifths of all Haitians depend on the agriculture sector, mainly small-scale subsistence farming, and remain vulnerable to damage from frequent natural disasters, exacerbated by the country's widespread deforestation. Haiti suffers from a severe trade deficit, which it is working to address by moving into higher-end manufacturing and more value-added products in the agriculture sector. Remittances are the primary source of foreign exchange, equaling nearly 20% of GDP. Haiti's economy was severely impacted by the 2010 Haiti earthquake which occurred on 12 January 2010.