*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001045
1970000000
1971001012
1972000000
1973000011
1974001001
1975001001
1976000000
1977002002
1978001001
1979002013
1980001001
1981002035
1982003025
1983001023
1984002002
1985003014
1986004015
19870070411
1988007018
1989005016
19900090110
199100250025
199200240024
199300270027
199400400242
199500430144
199600290029
199700390443
199800230124
199900230427
200000200020
200100340236
200200250126
200300150116
200400230023
200500140014
200600170017
200700140620
200800230124
200900440044
201000410041
201100330437
201200580462
20130013401135
201400940094
20150012205127
201600182010192
20170027009279
20180034104345
201900230010240
202000466015481
202100344016360
20220027202274
2023000000
Total00314201263268