Here are some key points:
* 1990: 28.1 million people spoke a language other than English at home.
* 2000: 37.6 million people spoke a language other than English at home.
* This represents an increase of over 33% in a decade.
Factors contributing to this increase:
* Immigration: The US experienced a significant increase in immigration during this period, particularly from Latin America and Asia.
* Natural population growth: The children of immigrants born in the US often continue to speak their parents' native language.
* Shifting demographics: The US population was becoming more diverse, with a growing number of people from different cultural backgrounds.
This trend of increased linguistic diversity has continued into the 21st century. The US is becoming increasingly multilingual, and the number of people who speak a language other than English at home is expected to continue to rise.