In the United States, life imprisonment is amongst the most severe punishments provided by law, depending on the state, and second only to the death penalty. According to a 2013 study, 1 of every 20,000 inhabitants of the U.S. were imprisoned for life as of 2012. Many U.S. states can release a convict on parole after a decade or more has passed, but in California, people sentenced to life imprisonment can normally apply for parole after seven years.The laws in the United States categorize life sentences as "determinate life sentences" or "indeterminate life sentences," the latter indicating the possibility of an abridged sentence, usually through the process of parole. For example, sentences of "15 years to life," "25 years to life," or "life with mercy" are called "indeterminate life sent