There are two types of facilities: detention facilities and correctional facilities. The detention centers are used as temporary holding centers for those waiting either to be transferred or to stand trial. Correctional facilities consist of prisons and state/federal prisons. Prison is the place where people who have committed crimes and have been imprisoned for less than a year will go. On the other hand, prison is where people who commit crimes are incarcerated and usually for at least a year. There are currently more than two million people in prison. The United States has more people in prison than anywhere else in the world. According to the Bureau of Justice Statistics, 2004: “In 2004, the United States had 1,410,000 prisoners incarcerated in more than 1,500 state and federal prisons. Additionally, more than 714,000 people were in local jails, more than 100,000 children were in custody, and approximately 5 million were on probation or parole. »Many people are unaware of the colossal number of people in prison. This large number of incarcerated people has led to overcrowding. There are three main factors contributing to the increase in the prison population: stricter drug laws, drunk driving laws, and the closure of psychiatric facilities. According to AmericanCJStystem, "construction costs increase to $50,000 and more per cell and the cost of imprisonment reaches $20,000 to $30,000 per year per inmate, there were limited limits ».