*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197033190833
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
1999044240472
200002124004256
200102314403278
200202134701261
200312713901312
200402284402274
200511224802173
20062967102171
200711008701189
20080769100167
200904512006171
2010412513701267
201119119105288
2012419721203416
2013830821801535
2014430525405568
2015537940804796
2016643736805816
201712529574041119
20189508485051007
20196599565041174
202095906700101279
20213628710061347
20222747316011066
202300370037
202401370038
Total8782346185014514651