Release year of the browsers (v3 - current)?

Anyone know when all browsers from version 3 to the current ones were released ? Release year would be enough.

Netscape 3 - ???
netscape 4 - 1993 ??? [im guessing]
netscape 6 - ???

IE 3 - 1993 ???
IE 4 - ??
IE 5 - 2000 ??? [...guessing again]
IE 6 - 2002 ?

thanks,

http://www.blooberry.com/indexdot/history/browsers.htm

thanks Nightfire!