The document provides data on English language proficiency among Asian and Pacific Islander speakers ages 5-17 in the United States and its states/territories. It shows the percentage who speak English only and the percentage who speak English very well in both 2009 and 2000. Overall English proficiency has increased from 2000 to 2009 across most locations. California has the lowest percentage speaking English only while states like West Virginia, Mississippi and Maine have the highest percentages.