*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19702350010
1970001001
1971000000
1972001001
1973002002
1974000000
19750840012
1976013004
1977003003
1978103004
1979036009
1980053008
1981102003
1982013004
1983005005
1984001001
1985014005
1986015006
19870290011
19880840012
19891390013
199081790034
1991111210033
199213100014
1993216100028
1994150140065
1995532120049
1996835160059
199731422600171
19981842200107
199921033600141
20003745100128
200151501800173
200201435300196
200322474800297
200432054900257
2005821321600437
200661854300234
200711524000193
200851546300222
20097738800168
2010920914900367
2011012713900266
20121036917100550
201382289400330
201473099200408
20151069323200935
20161238321500610
20171161631700944
201814791266001071
20191457923800831
2020755622400787
20211656421100791
20221758625200855
20232515800111
2024000000
Total214818635760011976