I found a much more precise table of values on this site. I used the Babel 2005 16-bit average values in ppRGB space and transformed the numbers into Lightroom percentages taking into account the 2.2 gamma of lightroom. The table below has the actual values. Again, I had to make it into a graphic because of blogger's braindead handling of inline tables. You can see that there are small differences in most places, but one patch is quite different. Funny enough (because it is the color people complain about in ACR/LR), it is the orange patch that was 2 percent off in the blue channel. Use these values if you're using a colorchecker inside lightroom.