*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700660108120
1970001045
19710300912
1972001078
1973001089
1974002068
19750110911
197601201417
197700501419
197800301114
197900301518
198000201820
198100401822
198200502126
198300101617
198400002121
198501912031
198603802233
1987011602542
198802602331
198915902035
199018912140
1991291801746
1992281402246
19934132622671
199452263029119
19952144632691
19961144412080
19971104103385
19982264502699
19991131402553
200031346041103
20011164003390
200222466219113
2003527103331169
2004027140133201
200515375137167
200653496234171
2007633124244209
2008228154729220
2009157145150254
2010255168267294
2011055241072368
20121128188311631339
201315413130504152148
201410487132924582286
201526469183135762905
20168551194737233232
201736557213118243549
20189586222047743593
201936826304679344849
20200325427551014
2021040004
2022000000
Total20147591674952676628527