*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000512121217
Feb003773427807
Mar110176700869
Apr44756800619
May141060984002058
Jun2229791387004388
Jul817201859003587
Aug1211995002017
Sep021520001522
Oct001081001081
Nov0064600646
Dec00271210741347
Total5059301145510271320158