*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197004702334
1970007029
19710310610
1972002035
1973012036
1974024039
197501140116
19760340613
19770280414
1978012047
19790360514
19800290314
19810160411
19820380617
19830270514
19840280818
1985012069
198615170528
198701150420
19880760720
198929180534
1990460190487
1991326270258
1992319180444
19933613404102
199411686604239
199581192604157
19969833605133
199784634707525
199863253606373
199932693705314
200013614208412
200163435405408
200213168705409
2003142511904549
200474587809552
2005039312706526
2006536812806507
2007033312905467
2008021720305425
2009318420506398
2010620528205498
2011116934308521
20125551234012802
2013553527706823
20143606256014879
201557153860291135
201638253590231210
20171010765030191608
201889595060261499
2019611555840191764
2020612577770132053
2021113936960212111
2022313965590151973
202304420046
2024000000
Total137159007465042723929