| Single-area transformation | Double-area transformation | Triple-area transformation |
m1 | 5.63 × 10−2 | 5.58 × 10−2 | 5.50 × 10−2 |
m2 | 5.61 × 10−2 | 5.52 × 10−2 | 5.48 × 10−2 |
m3 | 5.52 × 10−2 | 5.44 × 10−2 | 5.31 × 10−2 |