*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19701170040121
1970400408
197110000010
1972700007
1973700108
1974600208
19758002010
197613001014
197712003015
197812001013
197916002018
198016002018
198117000017
198218003122
198321002023
198421000021
198517000017
198621014026
198720008230
198821003226
198919029636
1990172392253
19911421210846
1992201512745
19932012161857
199425002767119
19952313111351
19961914213378
199727111194134
1998230632106167
19991902215193
200027012468120
200130032072125
200217004056113
200317024276137
200423012186131
200527013461123
200629048569187
200728427468176
2008278112815179
200916011319157
2010270321317260
201135103004340
201268319218182
201310011235139
201411135543
201500126128
2016300205
2017010001
2018000000
Total9952764161110603757