*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197001110108120
1970003047
1971002079
1972001078
19730020810
197402100416
19750040711
19760320914
197700501217
19780020911
197902701524
198000301619
198100101617
198201801827
198300501217
198402601725
198503601625
1986051102137
1987022601745
1988012601946
1989063302362
1990215511740
19916122211556
199238622114126
1993235524121403
199451272370191333
199541595224181643
199621238201141275
1997241023122458
1998267421125723
199919013117122
20002978331281042
2001466436231737
200201039581221120
2003080646122875
200421052480241126
2005217575236290
2006170785227822
20070726115033874
20082329118935493
2009390152046291
20101351238058648
20116318301071696
20122270589621391764
201317958148043172776
20141210431362113882816
2015209411820235843388
20162610441759286033460
20172112122300315834147
20182113712395336784498
20193513203459257705609
20201354293217611430
20210399500404
2022000000
Total2272235717457208580346052