*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197041180427
19701180010
197106140020
197206430049
197310120114
197402160018
1975006006
1976004015
19771170110
1978003003
1979004015
1980001023
198110120013
198200140216
1983003014
1984002035
1985116019
1986015028
1987005016
19883080112
198912130117
19903280114
199197140030
19922290114
19933590118
199445310343
199516530262
199608330142
1997310270141
199804490255
199923240029
200043380146
200153380046
200220420145
200302290233
200403400144
200541260233
200612580364
200733460153
200802140016
200910190020
201073620476
201152400552
201260660173
20139210601118
201416512500146
20158414303158
201610515901175
201712616804190
20189716002178
20198912202141
2020221421602254
202122623303264
202291014304166
202304530057
202400430043
Total20316926500773099