*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
20094211403123
20104317302182
20112720716223
201202117013132
20131210200105
201417250033
201500120113
2016003003
2017000000
Total94230170523192350