*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001794795
Feb101740236411
Mar2125400257
Apr1152700529
May21490200918
Jun11956500585
Jul101433600360
Aug13549500513
Sep521106001113
Oct1064900650
Nov0029900299
Dec0018318681052
Total36565490218987482