*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000202
1970000101
1971000101
1972000101
1973000101
1974000101
1975000101
1976000202
1977000101
1978000101
1979000101
1980000101
1981000000
1982000202
1983000101
1984000202
1985000314
1986000213
1987000235
1988000404
1989000347
19900001910
19910004913
199200135357
199300049094
19940002279281
19950003254257
19960005284289
199700067682
19980011255257
199900013435
20000006281287
200100182129149
2002001313256282
20030007115122
20040008264272
200500088593
200600018107125
200700114177192
200800097584
200900011516
20100004675121
2011000363167
201200043539
201300066167
2014000246993
201500011213
2016000279
2017000202
2018000000
Total003429031263450