The state's share of gambling dollars amounted to $180 million last year, making slots the third-largest source of revenue in its general fund.

This year the slots raised $372 million, the state's third-largest source of revenue, after income and sales taxes.

Google said the Groups service is now the company's third-largest source for advertising revenue behind its Web and image search services.

And tourism is a mother lode for Mexico, its third-largest source of income, generating an estimated $8 billion a year.

Cassava is the third-largest source of food carbohydrates in the world.

Remittances are Mexico's third-largest source of income, after oil exports and tourism.

The tourism industry, the country's third-largest source of foreign income, has also suffered substantially in recent months despite efforts to promote Mexico as a safe destination.

That makes Mexican migrants the third-largest source of foreign exchange in Mexico, behind oil and tourism.

Red Bull is the third-largest source of beverage profits in convenience stores, according to one recent market survey.

During the early 1980s, California was facing increasing competition from other states in the arts and entertainment industry, which is its third-largest source for tax revenue.