*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19701020811
1970000000
1971000000
1972000000
1973000000
1974060006
1975020013
1976020013
1977014016
1978024017
1979023016
1980001001
1981014016
1982016018
1983104005
1984002024
1985120014
19861160210
19871570215
19882180213
198910100314
199021050320
199165130125
199221130117
199376220338
199467180536
199534180328
199643170125
1997210250239
199858250341
199902200830
200003220328
200125260235
200200300434
200314240332
200402220428
200522440250
200602340541
200720370443
200800550156
20092012303128
20105020701213
20116122204233
201252271012290
20130212102125
20140080210
201510110315
20160070310
20170060410
2018002002
2019000000
2020000000
2021000000
Total71105150901191804