*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970200406
1970000000
1971000000
1972000000
1973000101
1974000000
1975100001
1976200002
1977000404
1978100203
1979100809
1980000707
198110012013
198200010212
1983100607
1984100405
1985002103
1986101709
1987101406
1988102508
198900211114
199000214521
199100554362
199200316019
199320319428
1994102271242
1995001529549
19960012331257
1997104301247
199810321631
199911113622
200010424635
200110718329
200200225229
2003002381050
200400128433
200500040545
200620753264
200710163065
200810281286
200900121059126
201000101376153
20110051893197
20121021172122
201300171173
201400014014
201510012114
2016000000
2017001203
2018000000
Total27111513591241626