*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00039319358
Feb001345104243
Mar6422100231
Apr14623400281
May91289349001647
Jun363312374003722
Jul271381281001689
Aug32024900272
Sep0526600271
Oct0018300183
Nov0014300143
Dec008999771075
Total826057252353140010115