#       Ei              S0              Err
# PBE
             0.9           0.1225           0.0164
             1.3           0.1625           0.0184
             1.7             0.16           0.0183
           2.287           0.1075           0.0155
# RPBE
             0.9                0                0
             1.3           0.0125           0.0056
             1.7             0.02            0.007
           2.287           0.0625           0.0121
# vdW-DF2
             0.9            0.045           0.0104
             1.3           0.0425           0.0101
             1.7            0.025           0.0078
           2.287           0.0075           0.0043