*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000314
1970000303
1971000101
1972000000
1973000000
1974000000
1975000000
1976000101
1977000404
1978000213
1979000202
1980001214
1981000202
1982000101
1983000101
1984000101
1985000314
1986000404
198700110516
1988000527
198900017926
199000222933
199100271726
199200272736
1993000125264
199400526127158
1995001115971
199600187988
199700514140159
19980008154162
199900110166177
200000232224258
200100314186203
200200026205231
200300331374408
200400025542567
200500339255297
200600472317393
2007002102344448
200800171265337
200900276174252
2010002165236403
201100215293247
201200130356387
201300296181279
2014003113421537
2015002332762
20160013610
2017000011
2018000000
Total0054124750776378