Billboard.com have on their website all of their 2005 Year End Charts.  Considering Dynamite was only released in the US in late September, the album performed fairly well...

• Hot Dance Club Play Singles - Feels Just Like It Should #45/50
• Hot Dance Club Play Artist - Jamiroquai #23/25
• Top Electronic Albums - Dynamite #24/25
• Top Soundtracks - Napoleon Dynamite #25/25

Finally, in the "European Top 100 Albums Chart", Dynamite was at number 53. All the charts can be found in full at the Billboard website.