*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197001170018
1970000000
1971002002
1972001001
1973105006
1974002002
1975054009
1976002002
197700100010
1978004004
1979107008
1980007007
1981009009
1982006006
1983007007
1984004004
198500100010
1986116008
198700110011
198821100013
198917130021
1990014320046
1991510210036
199206250031
1993016250041
1994117350053
199579420058
1996225240051
1997327520082
1998019500069
199929470058
2000289000100
20012913200143
20024313800145
20032312200127
20042118700100
200512111300135
2006199000100
200701211600128
20085712900141
20092714300152
201001414300157
201122118900212
201221225400268
20135523100241
20141823800247
20155533400344
20163429800305
20173437700384
20183945600468
20196349700506
20203257300578
20212359100596
20220150500506
2023008008
2024000000
Total823486344006774