*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001010
Feb002035
Mar03180021
Apr5262854001121
May132731568003312
Jun432929596003568
Jul32133947001112
Aug6353700546
Sep0220300205
Oct00420042
Nov2080010
Dec00101718
Total101606337760309970