*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001515161531
Feb02959445651192
Mar01622323002485
Apr32573754004014
May116521339006871
Jun379088409009534
Jul4315553649005247
Aug25301983002038
Sep1111854001866
Oct011621001622
Nov001169001169
Dec00541514952041
Total120176541823624357639610