*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19702631302062
197013230119
1971311038
1972501028
1973403029
19745060213
197518080430
197620080533
19779570627
197835260750
1979434180772
1980161100734
1981911801341
1982451001534
198374140530
198452701125
19851151201139
19861482001254
19871492601665
1988382229016105
19891152501354
1990683401058
19913555508103
1992944901274
199323990012134
1994282136017183
1995141399016142
19969588012114
199792117017145
19986710809130
19992215601493
200070110021138
2001102100016128
200293129017158
2003124178117212
200462128016152
2005106195018229
2006192220023264
200754199022230
200888223019258
2009902287028407
2010484348027427
2011772348036463
2012148513062597
20131320526150610
20143014585081710
20153577500110902
201650999401201173
20174112109711131264
2018436121301371399
201926812190891342
202035413110871437
20213815134901071509
202228110780991206
202353620575
202496750393
Total1139287143143162817371