*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001318319
Feb20127095224
Mar541332001341
Apr1192456002476
May81632385002556
Jun491872214002450
Jul681544200525
Aug18232200342
Sep1059600597
Oct0071100711
Nov0048200482
Dec001050525630
Total15239011172193812653