First, note clearly that ** I ** did not say static. I said that CO2 has been in the 180-280 ppm range for that whole period, and this encompasses the entire range of glacial-interglacial climate variability.
I'm not absolutely sure I can find an on-the-Web chart of the whole 640,000 years data. First, here's the 480,000 year chart (this is just one, there are lots of them available):
Well, I got luckier faster than I thought. The image below is reduced in size; click it to see the full-size one.
