*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970232131204252
197044620153
197134610151
197246280276
197328420088
1974296400102
19750118902129
19767881602113
197781062402140
1978010617014137
197971171302139
1980101624703222
198171452404180
198291621402187
1983111822601220
198461993002237
198511482802179
19861148901159
19871181903194
198841851602207
19891161800170
19901174801184
199131041003120
19921127801137
199311381201152
19943149602160
199521101101124
19964118701130
19970126702135
19980126701134
199912291101242
200034013500439
200164336110501
200273992601433
200374596903538
20041040826010454
200584393001478
20061258058010660
200754723603516
200844502700481
2009145811401574
2010257516102740
2011142012001542
201244407800522
201334977601577
2014404863602564
20152048315402659
20162152111405661
20174055913705741
20181340123906659
201925227200596
20202491101495
20210526100527
2022000000
Total338145762077111817110