*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002504506
Feb1241522194373
Mar09426700361
Apr018731200499
May81302183001493
Jun151956356002327
Jul10763451001224
Aug67547600557
Sep06751800585
Oct05231800370
Nov03024500275
Dec091060604719
Total4045593384413029289