*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197021502129
1970000011
1971000011
1972001023
1973100023
1974012014
1975002035
1976001168
19770031610
1978000044
1979002035
1980001056
1981000044
1982001056
1983001089
1984002035
1985001045
1986012058
1987004048
19880140813
19890140611
19900120912
19910071513
19920080513
19930060713
199404130926
19950060511
19961090515
19970350311
199800110516
19990060511
200001100617
200100150520
200201130115
2003006028
200403110721
200506150223
200600100313
200711131723
2008001901029
200901140722
201010260835
2011012601138
2012225011469
201301160825
2014135101166
20150482029115
2016236001984
201733120120147
20181979220111
20190584113103
2020310153024190
202121080061153
202229143042196
2023223007
Total2488120894901819