*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197006130019
1970001001
1971170008
1972000000
1973000000
1974000000
1975023005
1976030003
1977002002
1978011002
1979120003
1980000000
1981002002
1982116008
1983000000
1984126009
1985132006
1986034007
198716140021
198805210026
198907180025
199013360040
199151960030
1992398300104
199304341300447
19946104334001083
19952923800933
19964879900892
199734311500449
199818011200814
199903011000311
20004116022001186
200147952000819
20022117240001214
200318612800890
20041137521001397
200524504600498
200604964100537
200745837800665
200834506800521
200922238100306
2010344614400593
2011017515100326
20121040510700522
20131061217400796
20141064819800856
20151474121000965
201613913238001164
201791099292001400
2018171109396001522
2019231078452001553
202071443555002005
2021121406457001875
202261144428001578
2023000000
Total1882379444560028438