*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197010502127
1970001012
1971000044
1972001012
1973001034
1974012014
19750150511
1976021036
19770360514
1978042039
197926110524
19800170513
198100110718
198210160724
19830290011
19840030710
19850350412
19860290516
198706901227
1988041301128
198906111826
1990316230547
19911210250653
199209260944
19934112901256
19947234601389
199546310748
19961223300570
19977214801288
1998210390758
199938320952
200034350850
2001853801162
2002236101076
2003335901075
200446400959
2005205801676
200612560968
2007166301181
200800850792
200942114010130
20104317309189
201127209114233
201202119023144
201312107013123
201428310748
201500140923
20160060814
20170060814
2018002002
2019003003
2020000000
Total95231173623952459