*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970131007791
1970002035
1971011001021
1972000077
1973011079
19741130611
19750220812
197602401319
197701801221
197801201215
197903701525
198002301318
198101301822
198202702231
198303601928
198403302127
198502812031
1986051002136
1987022702049
1988061502041
1989092001948
199095821519112
19918202801571
19925123101967
199346846022140
1994719786028318
1995105935023127
199689250019169
1997228467129383
19981021355122301
1999317850021252
2000323751128320
2001425352032341
2002223284020338
2003229976121399
2004340269021495
20053272111035421
20066257159038460
20075194186341429
20081262242623534
20093152301040496
20103133375047558
20114115546155721
201226581110211131823
201328980197661833173
20142912062372162523875
20153616643320244745518
20165021944505306187397
20177223175048257018163
20186127455642347059187
20197831015898307979904
20200227231589894
2021031004
Total4871884232998217541357957