Quoc: The Air Jordan IV was re-released in 1999 and retroed in 2000, 2004, 2006, 2008, 2010 -- 2013 and 2015 -- 2017. Recent retroed colorways are the Retro 4 "Legend Blue", "Oreo" in early 2015, and the Retro 4 OG "Cement" that released on February 13, 2016.

Answer this question based on the passage: when did the air jordan retro 4 come out?
HW Chung: OK, some thoughts:
The relevant information is: The Air Jordan IV was re-released in 1999 and retroed in 2000, 2004, 2006, 2008, 2010 -- 2013 and 2015 -- 2017. The answer is 2000.