*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00029193
Feb013413369
Mar05630068
Apr012750087
May32149900316
Jun3050331400847
Jul5316760700827
Aug173523300285
Sep1114700149
Oct00950095
Nov00740074
Dec00150139154
Total104938175632633064