*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004520524
Feb001081131240
Mar0418800192
Apr11914100161
May41370172001546
Jun595913659006631
Jul505144170004734
Aug41442850002935
Sep811177001186
Oct0131600317
Nov0016400164
Dec00890629718
Total1637866100345128019348