In the same year, for the City of Los Angeles, of the 1,721,778 workers aged 16 or older, 63.3% commuted to work driving alone, 11.5% commuted by driving in a carpool, 11.0% commuted by public transportation, and 3.4% walked. The percentage of population using public transport in Los Angeles is lower than other large U.S. cities such as Chicago and New York City, but similar to or higher than other western U.S. cities such as Portland, Oregon and Denver, CO. 63.8% of public transportation commuters in the City of Los Angeles in 2006 were non-white, 75.1% were Hispanic and 73.9% were foreign born.  79.4% of public transportation commuters earned less than $25,000 and 37.6% had no vehicle available to them for their commute.
Question: What type of commute was used the least?
Answer: walk