Predicting absolute values from absolute values:

N rmse_train rmse_test
1    34.6992   36.2077
2    32.9419   35.9803
3    31.6969   36.7328
4    30.8152   38.3520
5    29.5585   39.4920
6    27.8364   42.2380
7    26.5724   43.5683
8    23.0473   51.7227
9    21.2536   56.7159
10   14.5591   80.7457



Predicting percentage changes from percentage changes:

N rmse_train rmse_test
1    44.8814   44.9867
2    37.8820   39.4872
3    35.4900   38.4557
4    33.6695   39.5987
5    32.4268   39.5005
6    30.4829   42.1554
7    28.7479   43.0346
8    25.6411   48.8315
9    23.3305   53.1672
10   17.7533   68.0583