*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan13416020152
Feb390045084
Mar00014110151
Apr00330724334
May00756550622
Jun001615242531793
Jul001043260502
Aug0043417352
Sep0022866294
Oct0001932195
Nov0001150115
Dec48020590541
Total653184240104125135