*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000101
1971000000
1972000000
1973300003
1974500207
1975700007
197612002014
197711003014
197812004016
197915002017
198014001015
198117000017
198220000020
198317002019
198420000020
198516000218
198619005226
198720009231
198823102228
198919008936
1990191031538
19911710211655
1992200217746
1993220226858
19942702392593
1995220516952
19962103212267
19972601511795
199831016235129
19992000491887
200031007822131
20013402797122
20022203871113
200324011063134
200424031027136
20053100900121
200634001675206
200733301302168
2008251011505191
2009300316311207
201024121901218
201131102801313
2012680115211232
2013140072187
201430154765
201530145554
201650014120
2017000202
2018100001
Total912183423072793550