*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970202802454
1970014038
1971104049
1972103059
1973002046
1974005038
19750170412
19761070614
197710110517
197800180826
197990200635
198018360532
1981222201339
1982811801138
1983162160943
198413860532
19850150410
1986122401239
1987062921855
1988243701356
1989283601561
1990293745013124
1991193069012130
199211891013123
19931217191021241
19941555303019392
1995917241024291
1996935213018275
19971239190023264
1998961223018311
19991131124021187
2000640247029322
20012413275023335
2002105289018322
20032916326020391
20042310333016382
20051511269025320
20062818342032420
200723213671236459
200835424381030555
20092523557049654
20103923572045679
20113316701162813
2012511987701211068
20134435132031771579
201466107138822341797
201515150171123712285
201614126211654912779
201711749279525433506
20187936309455783792
20195741330455403947
20205924359126264302
20214623375506094433
20225523265445523288
202391600777
202422580466
Total138010433343755559741512