The U.S.A. is (as of 2004) the home of approximately 336 languages (spoken or signed) of which 176 are indigenous to the area. 52 languages formerly spoken in the U.S. territory are now extinct. The U.S.A. does not have an official language; nevertheless, English is the language used for legislation, regulations, executive orders, treaties, federal court rulings, and all other official pronouncements. Spanish is the second-most common language in the U.S.A., after English, being spoken in some grade by about 28.1 million people (or 10.7% of the population) in 2000. Nowadays, the U.S.A. has the 5th largest Spanish-speaking population in the world, after Mexico, Colombia, Spain and Argentina. Spanish has a status of official language (along with English) in the state of New Mexico and in Puerto Rico, which is a self-governing unincorporated territory of the U.S.A.. Although many Latin American immigrants have various levels of English-proficiency, Hispanics who are second-generation Americans in the U.S.A. almost all speak English, but only about 50% can speak Spanish.