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Energy differences between frozen core and all electrons correlated.
MP2, MP3, MP4, B2PLYP, CCSD, and CCSD(T)

For BrO (Bromine monoxide)

Energies in Hartree
Methods with standard basis sets
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ daug-cc-pVDZ daug-cc-pVTZ
Moller Plesset perturbation MP2=FULL -0.000077 -0.005061 -0.011846 -0.011659 -0.029657 -0.029657 -0.030845 -0.412201 -0.412201 -0.090136 -0.463472 -0.082537 -0.009859 -0.057479 -0.110543 -0.012391 -0.063230 -0.112814 -0.013313 -0.066890
MP3=FULL         -0.027777   -0.051194         -0.072195 -0.008669 -0.051075            
MP4=FULL   -0.004796     -0.028727       -0.389235       -0.009275 -0.055514   -0.011801 -0.061105      
B2PLYP=FULL -0.000026 -0.001510 -0.003598 -0.003410 -0.009064 -0.009064 -0.009413 -0.120806 -0.120806 -0.027643 -0.135871 -0.024298 -0.003011 -0.017136   -0.003776 -0.018781   -0.004053 -0.019816
Quadratic configuration interaction QCISD(T)=FULL         -0.028432           -0.430969   -0.009099 -0.054085   -0.011565 -0.059523   -0.012434 -0.062901
Coupled Cluster CCSD=FULL         -0.027837         -0.084004 -0.426315 -0.074711 -0.008713 -0.052368 -0.102373 -0.011083 -0.057758 -0.104453 -0.011923 -0.061137
CCSD(T)=FULL         -0.028444           -0.430826 -0.076542 -0.009107 -0.054050 -0.104654 -0.011570 -0.059487 -0.106743 -0.012439 -0.062871
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ daug-cc-pVDZ daug-cc-pVTZ