*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197039210033
1970005005
197101100011
1972001001
1973013004
1974022004
1975034007
1976033006
1977015006
1978011002
1979025007
1980103004
1981023005
19820670013
1983024006
1984044008
19851630010
19860960015
198717120020
198807100017
198918190028
1990352160071
1991327150045
1992318220043
199321332300158
199432475800308
199532083300244
199682992300330
199755334400582
199834633700503
199933423000375
200085695300630
200198864000935
200205998600685
20032119968001269
20044129470001368
2005276411400880
2006964413800791
2007264217000814
2008480117500980
2009541821900642
2010341938100803
2011220637200580
201213780280001073
2013201000278001298
201417962347001326
2015181140383001541
2016141184426001624
2017201553417001990
2018231617563002203
2019241894621002539
2020101814795002619
202191996821002826
202252129521002655
202335290037
202404350039
Total2692692578240035018