*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004521525
Feb001101133244
Mar0419000194
Apr11914200162
May41370180001554
Jun535919687006659
Jul485164219004783
Aug41462895002982
Sep731193001203
Oct0131800319
Nov0016500165
Dec00890629718
Total1547878101885128319508