(From CO2 Now, an advocacy group, but they appear to get their data from the Mauna Loa Observatory, so we can establish sufficient credibility.)
Worse than even I expected. Remember the good old days when An Inconvenient Truth had just been released and CO2 was still at 380 ppm?
Nothing in science changes quite as fast as climatology data these days. My school chemistry handouts are outdated only in that sense; they keep saying that CO2 is at 350 ppm.