*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970413008
1970000000
1971000000
1972000000
1973000000
1974000000
1975002002
1976000000
1977000000
1978000000
1979000000
1980000000
1981001001
1982010001
1983001001
1984010001
1985010001
1986011002
1987012003
1988002002
1989022004
1990040015
19910740011
1992003003
199302210023
199408130084
199536360072
199614220045
199711450020
199807710078
199902230025
200017540080
200103240036
2002094701102
200307920081
20040132100133
200521760025
200607070077
200702350028
200801370020
2009127200048
2010018130031
2011023260049
2012139170259
2013062210083
201421161200130
20153743001108
20160882900117
20173943500132
20183963701137
201941156001180
202031434101188
202131033700143
202221245501182
202331924100236
202421753100208
202512420027
2026000000
Total432388592093032