Army Air Forces Statistical Digest,
World War II
Table 192 -- Twentieth Air Force -- Number of B-29s Bombing and Number of Missions Against Primary Targets, By Altitude of Attack: Jun 1944 to Aug 1945
Month Number of Airplanes Bombing Number of Missions Average Bombing Altitude (In Feet)
Below 8,000 Feet 8,000-15,000 Feet 15,000 - 25,000 Feet Over 25,000 Feet Below 8,000 Feet 8,000-15,000 Feet 15,000 - 25,000 Feet Over 25,000 Feet
  X  X      B O M B E R     C O M M A N D
Total 104 225 1,696 269 6 6 33 5 19,398
1944                  
Jun - 47 77 - - 1 1 - 16,778
Jul - - 70 - - - 2 - 20,000
Aug - 39 95 - - 1 2 - 17,526
Sep - - 83 90 - - 1 1 23,642
Oct - - 172 33 - - 3 1 21,127
Nov - - 242 - - - 5 - 20,000
Dec - - 233 - - - 5 - 20,000
1945                  
Jan - 66 290 - - 2 7 - 18,424
Feb 10 49 340 - 1 1 5 - 18,630
Mar 94 24 94 146 5 1 2 2 18,872
  X  X  I     B O M B E R     C O M M A N D
Total 3,545 8,435 10,204 932 49 89 156 16 15,866
1944                  
Nov - - 23 24 - - 1 1 23,500
Dec - 23 - 341 - 1 - 6 24,786
1945                  
Jan - - - 207 - - - 5 27,000
Feb - - - 360 - - - 4 27,000
Mar 1,855 - 288 - 9 - 2 - 9,366
Apr 288 1,189 1,291 - 6 19 57 - 17,079
May 339 1,043 2,497 - 9 7 38 - 16,731
Jun 715 1,025 3,048 - 14 9 30 - 15,123
Jul 292 4,282 1,120 - 9 43 13 - 12,577
Aug 56 873 1,937 - 2 10 15 - 15,889