I'll also expose my own sources:
http://www.speakout.com/Election2000/President/Nader...

By the way, a presidential write-in candidate (what Nader was in 1992) is a person whose name doesn't appear on the list of candidates but can be written by hand on the voting form. I guess this means in 1992 he was participating as a pure act of protest.

More stuff:
http://www.envirolink.org/greens/rn/concord.html

and, least reliable of all, the official biography:
http://www.votenader.org/biography.html

The 1996 elections were easily won by Clinton:
http://www.fec.gov/pubrec/summ.htm

Enjoy the research...