*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001638639
Feb035161441961
Mar1612428002490
Apr21314582004715
May14102139820011209
Jun891633512150017639
Jul7518223967005864
Aug591366001380
Sep0484800852
Oct0058700587
Nov0016200162
Dec001020702804
Total18628578167552178147302