*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19701380340145
1970400105
197110000010
1972700108
1973800008
19747001715
19759004720
197613003420
1977160114637
197813009527
1979160322445
1980180018137
1981190124145
1982230325051
1983200010434
1984220113036
198519027634
1986210517346
1987282623867
1988250416550
19892418221570
199023114312594
1991202377625160
19922101410311149
19933212417826261
19943702614562270
19952812710523184
1996250258257189
19973711817062288
19983001313567245
199925149437161
20003702012736220
20013601217613237
200218022339262
20032911624010296
2004320821025275
20053601928214351
20063001535518418
20073551526714336
20083211939412458
20093402262112689
20103902674421830
201149091014221094
2012117613840381014
20131211256870663
201411317527207
20158021105125
201610427234
2017000202
2018000000
Total128435446773881910322