40 x 1. 1-40 (24.68 avg depth)
40 x 2. 41-80 (26.28 avg depth)
40 x 3. 81-120 (27.50 avg depth)
40 x 4. 121-160 (27.58 avg depth)
40 x 5. 161-200 (29.15 avg depth)
40 x 6. 201-240 (29.45 avg depth)
40 x 7. 241-280 (30.85 avg depth)
40 x 8. 281-320 (29.75 avg depth)
40 x 9. 321-360 (30.78 avg depth)
44 x 10. 361-404 (31.00 avg depth)