*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19701070210
1970000000
1971001001
1972000000
1973000000
1974001001
1975000000
1976001001
1977000000
1978002002
1979003003
1980001012
1981001012
1982002002
1983015006
1984001001
1985001001
1986104005
19872090011
1988017008
1989106007
199014140221
199142250132
199231100014
199332260031
199424330039
199582440155
199643220029
199712320136
199814160021
199912130016
200023150121
200134210129
200213220026
200340290134
200401270028
200552330040
200633270134
200700270027
200820400042
20091009600106
201012417100187
20116220802218
201223530403335
20134327703287
201414130801324
201510232303338
2016221137104408
201730551101547
2018411151001563
2019231253900574
2020112004
2021100001
2022000000
Total25010141480314530