*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197040803446
1970005027
1971103015
1972001045
1973010012
1974020013
197502120317
197605290741
197709170935
19780430815
1979010180937
19800615709127
19811301801665
19821481201475
19830301501560
19840291501155
198502390840
198601380728
1987027130747
1988339101861
1989023101741
1990431511051
1991134131554
199253140747
199322461942
1994329110952
19954342901178
1996735230873
19970371711166
19980392901078
199913870854
20005353001282
2001236300977
2002332410682
2003341280779
20043383701391
20052354501092
2006143320884
200734853011115
200814965011126
200915964012136
201034567013128
201124380017142
201275265015139
201304748020115
2014234390075
2015328150147
2016025170345
201702750032
2018002002
Total781405117064373096