For those keeping track, that lens was an EF 24-70 mm f/2.8L II USM, made on May 23.
The production of interchangeable EF lenses for Canon EOS-series autofocus single-lens reflex film cameras began in 1987.
EF lens production surpassed the 10-million-unit mark in 1995, doubled to 20 million lenses in 2001, and went on to reach 30 million units in 2006 and 40 million units in 2008.
Production of EF lenses gained further momentum, crossing the 50-million-unit threshold in 2009, reaching 60 million units in January 2011, and hitting the 70-million-unit mark in October of the same year.
In August 2012, lens production reached 80 million units.