*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970013004
1970003003
1971001001
1972000000
1973000000
1974000000
1975000000
1976001001
1977004004
1978012003
1979002002
1980112004
1981002002
1982001001
1983001001
1984001001
1985013004
1986004004
198715100016
1988025007
198909170026
199022920033
199121770026
199222770036
1993052120064
199451272600158
1995159110071
199617980088
199751401400159
19980154800162
199911661000177
200022243200258
200131861400203
200202052600231
200333743100408
200405422500567
200532553900297
200643177200393
2007234410200448
200812657100337
200921747600252
2010223616500403
201129315200247
201213563000387
201321819600279
2014342111300537
2015227330062
20161630010
2017010001
Total5450771247006378