The report revealed that the state had spent $4 billion on the death penalty while carrying out 13 executions since 1978, when the punishment was revived. The study further projected that by 2030, death penalty expenditure will balloon to $9 billion for death-row housing, health care, legal appeals and the actual executions. In addition, today’s California death-row population of 724 inmates—already the largest in the nation--would grow to more than a thousand.