I suspect it to be some Latin American country, but I tried google with keywords such as America refuse annex annexion 1870, 1871, 1872... 1879. etc. Even if I did find something about it, I seriously doubt that they put the vote result up. Like I indicated, I'm not too good at remembering numbers unless I have a direct interest in them (I can remember dates of historical events that interest me). However, in general I care more about the consequences of a vote than about the numbers; more about what a president said or did than the number of voters who brought him into office (unless this is of significant importance as it is in some cases).