Month

Angstrom-Presott Err (%)

Allen Err (%)

Sabbagh Err (%)

January

4.981

−4.696

−14.049

February

−10.066

−13.944

−14.802

March

−16.757

−17.934

−11.84

April

−23.745

−21.456

−5.409

May

−25.766

−24.973

−5.040

June

−27.056

−26.26

−4.164

July

−23.684

−22.859

−7.781

August

−23.314

−21.857

−9.331

September

−18.124

−21.876

−1.256

October

−11.506

−16.619

0.865

November

−1.523

−9.839

−3.638

December

11.066

1.630

−4.748

Average

−13.791

−16.724

−6.766