*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
20092012301126
20105020600211
20116122101229
20125227109287
20130211802122
2014007007
201510100011
2016000000
2017000000
Total7110514870981761