*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001521062121
Feb47778138571659
Mar109551942002106
Apr3591101642002111
May326881772002186
Jun3351542138002627
Jul333822346002761
Aug33221439001494
Sep271296001305
Oct101231001232
Nov0064800648
Dec00533215562091
Total15025251576530451922341