*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197023150828
1970002002
1971010023
1972000000
1973002013
1974031015
1975002002
1976013004
1977006006
1978002013
1979015006
1980002002
1981003014
19820180312
1983003003
1984041016
19850340310
198600100212
198703100316
19880680115
19890360413
199001190323
199103210327
199224230433
1993049190270
199422462608282
199502124004256
199622353901277
199701023805145
199802613604301
1999044230471
200002123904255
200102324303278
200202134701261
200312713801311
200402284302273
200511224802173
20062967002170
200711008301185
20080768900165
200904511906170
2010412513601266
201119118805285
2012419721203416
2013830821601533
2014530425105565
2015937540504793
20161243336405814
201720524571041119
201812505483041004
20199597562041172
2020125866650101273
20219618706061339
2022467630301984
2023000000
Total12281306048014414444