*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19705060011
1970100001
1971100001
1972101002
1973005005
1974001001
1975101002
1976001001
1977007007
1978101002
1979105006
1980102003
1981100001
1982102003
1983101002
1984103004
1985204006
1986106007
1987107008
1988106007
198901110012
199000180018
199131150019
199200120012
199321310034
199450380043
199530220126
199621280031
199723490054
199830390042
199940220026
200030290032
200130440047
200211430045
200312530056
200410690070
200501880089
200600470047
200700680068
200811590061
200970720079
20107010900116
20116011000116
20122014900151
20134113600141
20142013300135
20150018100181
20164126600271
20170130500306
20182033200334
20192232600330
20201130600308
20210041200412
20220029700297
2023007007
2024023005
Total92203988014101