*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970201402440
1970013037
1971104049
1972102058
1973002046
1974004037
19750160411
19761060613
197710110517
197800180826
197990190634
198018350531
1981222201339
1982711801137
1983162160943
198413860532
19850150410
1986122301238
1987062921855
1988243501354
1989183301557
1990283744013122
1991163063012121
19927895013123
19931218188021239
19941557301019392
19951019238024291
1996935213018275
19971239189023263
1998961222018310
1999831127021187
2000640245029320
20012115271023330
2002116285018320
20032716311020374
20042310310016359
20051511256025307
20062818315032393
200721213411236431
200835424201030537
20092623540049638
20103723547044651
20113216695162806
2012511986301211054
20134335130631771564
201468107137222341783
201515351169123702267
201614526210354882767
201712150277825423493
20188335308755783788
20196242328555403934
20206624355726234272
20214824372906074408
20225825256745253179
2023000000
Total138110533283555554840872