That's the table from Evan's Harvard class. It's probably decently accurate.
Thanks, there were a few that I haven't seen before.
However, I feel like I wan't to add my $.02.
I am observing these constants in various sources for about 20 years now. In most cases they were masured two or three times and results were similar - something like -1.3, -1, -1.4 - and they are now quoted again and again, in most cases nobody knows what was the original source and why this or that particular value is better then others. Sometimes sources are quoted but they are often from fifties or even earlier and difficult to check now.
This is not the whole truth at the far end - like HI or HClO4 - where accuracy of measurements is much lower. If the solution is diluted enough to avoid activitiy problems concentration of undissolved acid is often unmeasurable. If the solution is concentrated, activity effects start to play important role and it is not easy to interpolate the results for zero ionic strength.