*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700020810
1970001001
1971000000
1972002013
1973001012
1974051006
1975021036
1976013059
19770360312
1978024028
19791090212
19801030610
19810150612
198211100618
1983004026
1984002046
19850380516
1986033039
198722130320
198826100624
198951180630
1990216120636
1991318210850
199209130628
199349340956
19944303901285
19957174101277
19961230320882
1997526550995
19982325909102
19991175601286
20004144601478
200139420963
2002248908103
2003768608107
20041136901194
2005118112013144
2006126129012159
20075777016105
20083512216137
20095320105214
20103428403294
20113832105337
201235241015264
20131315602162
201401340035
201520200022
2016002002
2017001001
Total117340249012903238