It can be seen that the mean absolute error (MAE) for all the thermal contributions are less than 1 kcal/mol. However, a few individual thermal contribution errors are larger than 1 kcal/mol, namely B3LYP (both PP and full relativistic) and PW91. The most accurate methods can be seen to be either M06-2X with an MAE of 0.14 kcal/mol or ωB97X-D3BJ