*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970101101628
1970001023
1971002046
1972000022
1973001034
19740840214
19750530513
19760340512
197706110219
19780350412
197922130421
198000120719
198102160422
198221180526
198301140318
198400130518
19851680722
198613170627
198724231737
1988441701035
1989310120934
1990317300757
1991911450469
1992010490362
199369750898
1994132989017148
19958157008101
19961323460486
199723091016139
199832771010111
19990135711485
20001116201589
20014992014119
20022392010107
200335100011119
2004115105013134
2005310145015173
200646151016177
200723150014169
20080216909180
200983280017308
201025295012314
201107360019386
2012513623240683
20134910073271050
20146610571501120
20159613643661448
201636180741241944
2017124208931032211
2018811215911952284
20198521016832203
20200032268102
2021000000
Total1583811506837102416668