By 1840 how much cotton did the United States produce per year because of change in technology

Due to changes in technology, cotton production in the United States expanded from 750,000 bales in 1830 to about 2.85 million bales in 1850.

By 1840, the United States produced more than 50% of the world's supply of cotton.

i believe it is about 1.3 million bales