*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970100102
1970000202
1971000101
1972000101
1973100102
1974100102
1975200204
1976100203
1977200204
1978000101
1979000101
1980100203
1981100102
19822008010
1983000101
1984000505
1985200215
1986000437
198710016421
198820021124
198910028332
199000161825
1991001111325
199200116154171
199300112407420
19942021716861707
19952001419141930
19962012316941720
199720016402420
19981008607616
19990009153162
20001042311121140
200120021892915
20021003815271566
20031012010781100
20043012117251750
200500025350375
200641042846893
200710050773824
200800056444500
200900092119211
2010000135485620
2011300167300470
201200021335356
201300768494569
201400032486518
2015000221537
201600042933
2017000055
2018000000
Total4312010721807519211