*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970101201629
1970003025
1971002046
1972000022
1973001034
19740850215
19750730515
19760340512
197706100218
19780350513
197922130421
198000120719
198102150421
198221170525
198301140318
198400130518
19851680722
198613170627
198724161730
1988441701035
1989310120934
1990417290757
1991911430467
1992010470360
1993119690897
1994192984017149
1995815640895
19961323410481
199723075016123
199832767010107
19990135511483
20001115901586
2001497201499
200223820996
2003359508111
200411587011114
2005310133015161
200646136015161
200723126014145
20080214909160
200973261017288
201025283012302
201107334019360
2012412412039467
201348524023559
201446431032473
201595540038592
201636674051734
20171149420431000
20188119990411059
2019759941371044
202091012030501272
202110810711511141
2022499780531044
202300120012
202400140418
Total18740711384482412806