*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700350816
1970000022
1971000033
1972000011
1973000022
1974001034
1975000011
1976020013
1977000033
1978000000
1979010012
1980000000
1981002024
1982001012
1983011002
1984000000
1985002024
1986010001
1987002002
1988011002
1989033017
1990062008
1991004004
19920470213
199302360332
199401541301168
19950160402166
19960135502142
1997041100253
19980168803179
199901430017
200002021001213
200106990078
200201291100140
200304060147
20040150801159
200504980158
200602530028
2007028220050
2008024120036
200903120116
201009210030
2011010210132
20120663400100
2013068250093
20140854400129
20150684900117
201601076000167
2017113010304238
2018017712003300
2019213710600245
202003100031
202102700027
2022000000
Total323517640593177