*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan03910135157
Feb91756138121
Mar34808700201
Apr651999800362
May703320700310
Jun548336600503
Jul262616200214
Aug5212800135
Sep4612700137
Oct0111200113
Nov00820183
Dec01492574626
Total2674511483137482962