*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700660108120
1970001045
19710300912
1972001078
1973001089
1974003069
19750110911
197601201518
197700501419
197800301114
197900301518
198000201820
198100401923
198200502126
198300101617
198400002121
198501712029
198603802233
1987011602542
198802602331
1989151002036
199018912140
1991291801746
1992281402246
19934122622670
199452261029117
19952134432688
19961144312079
19971103803382
19982244502697
19991131302552
200031248042105
20010163703487
200222363218108
200362797329162
2004024135133193
200515173137163
200653292234165
2007531104243185
2008227146730212
2009143125149219
2010246151260261
2011053217072342
2012111352591106512
20136209317398633
201462233052133669
201592354504201899
201672474472232935
2017726754332351055
2018428350652321030
20191335466592331274
2020534796112861600
2021235789814111669
2022145354412211220
202304340139
202400110415
Total1203655762461353014990