*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000517501755
Feb0355936241189
Mar2101184001196
Apr3101188001201
May3352224002262
Jun5362022002063
Jul1121377001390
Aug251020001027
Sep0182600827
Oct0157000571
Nov0046300463
Dec00311010471358
Total16113117448342115302