*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001045
1970000000
1971000000
1972000000
1973000000
1974001001
1975000022
1976002013
1977102003
1978001001
1979003003
1980000000
1981002002
1982003003
1983000000
1984002013
1985101002
1986012014
19871190213
19885060213
198903150220
199032160425
199145150226
19921190415
199312250331
199412290234
199542290237
199644290340
199705540362
1998113680385
199924440555
200061400047
200160470457
200241540261
200300870390
200400480452
200510450248
200601520356
200701750379
20080110401106
2009100760187
201012014300155
20114017402180
201203860493
201301670068
201400320032
20151090010
2016001001
2017000000
Total735415080751710