That would be oil, which accounts for US$16 billion, or 5.9% of total exports. Following would be vehicle parts for US$15 billion (5.4% of total exports) and radio, telephone and TV parts worth US$10 billion (3.7% of total exports).
It is the second most important crop in Mexico, below corn. The Mexican state of Sonora - paradoxically, bordering the Sonoran desert - is where most of it production is made thanks to advanced irrigation techniques.
Textiles is the most important product for export.
The most important colonial export was cash crops. This was mainly in form of corn and tobacco which supported the economy of most colonies.
Spices
banana's are Ecuadors primary export crop.
Spain and the American Natives who were conquered by them. Of those, both Mayan and Aztecs are the most important.
Tobacco
sugar
the clothing and toys
Olive Oil :)
tabacoo
cotton