*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00126339366
Feb001575146308
Mar1524500251
Apr141026000284
May171240737001994
Jun1937051409005133
Jul81213801002022
Aug21426000276
Sep01032000330
Oct0222300225
Nov0015800158
Dec001067772885
Total616199467738125712232