*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970105006
1970003003
1971000000
1972000000
1973002002
1974000000
1975012003
1976004004
1977006006
1978004004
1979006006
1980107008
1981014005
1982013004
1983001001
1984002002
1985101002
198600100010
198701110012
1988106007
1989112140027
1990431160051
1991316170036
199235270035
1993150270078
19941893700127
1995852240084
1996260230085
199742552300282
199852152300243
199911742400199
200041973500236
200152684100314
200222406700309
200323407100413
200425135900574
2005228412400410
2006427716100442
2007324217000415
2008119518400380
2009620119200399
2010530035000655
2011013028800418
2012330414600453
201317217400247
2014010511500220
2015033630096
201603260029
201701490023
2018032005
201919300094
2020081009
2021050005
Total7847902610007478