*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000000
Feb000000
Mar009009
Apr01843700455
May147795543008352
Jun106221378670023110
Jul7535402515006130
Aug6191678001703
Sep241158001164
Oct00520052
Nov002002
Dec001034
Total2033351372620340981