*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan03910135157
Feb91755138120
Mar34788600198
Apr621999600357
May693120100301
Jun548336400501
Jul252615900210
Aug5212400131
Sep4612500135
Oct0111000111
Nov00810182
Dec01492574626
Total2624471459137482929