 Made from 1987 to 1994 and with no air conditioning, no airbags, no anti-lock brakes, and lacking space for the large modern volume of e-commerce packages, the Grumman fleet ended its expected lifespan in fiscal year 2017.The replacement process began in 2015, and prototypes have been produced by various bidders, but due to delays as of May 2020, a final contract for replacement trucks has not been awarded.It is by geography and volume the globe's largest postal system, delivering 47% of the world's mail.