; (2) the estimated economic impact on Arizona generated by the additional Mexican nationals visiting the State; (3) the difference between the number of Mexican nationals who overstayed their visa after entering the United States through a port of entry in the State of Arizona during the first 4 years of the 5-year period referred to in section 2(b) and the number of such overstays during such 4-year period; and (4) the improvements to border security and the cost savings realized by U.S. Customs and Border Protection as a result of the waiver under section 2(a), which reduced the number of personnel needed to process Form I–94 documents and using a portion of such savings to enhance law enforcement functions.