*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197020104043
1970102047
1971100078
1972100034
1973000066
1974002035
19750030710
197601101113
1977021001224
19785160820
1979912101243
1980203301449
1981633401659
198215067020102
1983812601247
19841521702357
19851202301550
19861641201951
1987811502347
19881161712257
1989821702350
19901165821693
19913712113118181
199219696019140
19933722189032280
19943230168139270
1995387139025209
1996242597029175
19971523114041193
19982233102030187
1999191882126146
20001820133033204
20012010108034172
2002115197029242
2003182175137233
20041921185028253
20052112245036314
20063412282031359
2007238199329262
200887286629336
20091220477063572
2010564670067797
2011268824383944
2012181058710153778
20131841637764767
20141332214122282
2015175112037171
201614069029112
201719855031113
2018113901235
201922184329
202021630021
2021112004
Total75545369524114259626