*Excludes Observations that spanned multiple years

Pre 197017
197056
197143
197269
197324
19748
197590
1976147
1977110
197854
1979117
1980297
1981307
1982346
1983239
1984227
1985292
198647
1987109
198839
198925
199030
199123
199231
199331
199412
199529
199633
199729
199847
199915
200028
200113
200225
200368
200430
200536
200619
200748
2008106
2009147
2010158
2011140
2012131
2013328
201442
201567
201627
201713
20184
Total4373