*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197007170125
1970000011
197101010011
1972001001
1973000022
1974012003
19750550111
1976032005
19770180110
1978013015
19790560011
19800380011
1981014016
1982014016
1983025018
1984044008
1985033006
19861540111
198702210023
198805220027
1989112320146
1990757120076
1991424160044
1992540130058
199342341300251
199436514902705
199525852801616
199633882901421
199716505500706
199845903502631
199943822600412
200036874002732
200148193300856
200208678400951
20038132653001387
20045146354011523
200565729800676
2006283215501990
20071934120011056
20083877183001063
2009457421201791
20102659363001024
2011254936201914
201281213276001497
201341184197001385
2014161436145001597
201521345172001519
2016111474219031707
2017141746273032036
2018121714257001983
2019151820380002215
2020111913384012309
202162064382062458
202231927514012445
202306340040
202401160017
Total18131674543403937328