0188-3380 0188-3380 S0188-33802021000100109 10.24275/etypuam/ne/542021/lopez Mexico Mexico Mexico 00 06 2021 00 06 2021 54 109 135

2003 25 289-301 2012 49 50-3 2008 Second Edition 451-74 1999 1-30 2003 45 4 4 627-85 2014 90 108-13 2012 12 12 12 1839-55 2005 33 1587-96 1988 1 1 1 41-66 2013 13-8 1997 1-27 2014 12-5 U.S. Energy Information Administration: Independent Statistics and Analysis 2014 1-38 2013 40 882-97 2015 419 444-56