Being a big fan of fivethirtyeight.com, and political nerdishness in general, I have repeatedly run into a plural use of the singular nominal 'vote,' most often in the phrase 'percentage of vote.'
Older People and Voting Participation: Past and Future, by Robert H. Binstock, 2000, The Gerontologist, Vol. 40, No. 1, from Oxford University Press. "Percentage of total vote cast by persons aged 65 and older" (page 27)
Red or Blue - Which Way Is America Heading? from Harvard University. "Democrats split between Douglas and Breckenridge enabling Republican (Lincoln) to win presidency with 40 percent of vote."
Why Buchanan County, Virginia’s election results are important for West Virginia, by Hoppy Kercheval, April 20, 2016. - "the highest percentage of vote he has collected in any U.S. county so far."
I'm wondering if this is a back formation of the adjective, e.g., from 'vote percentage', or if there is a true and grammatically sensical reason for this. It seems like they are treating 'vote' as uncountable (which is amusing, given the authors' professions), and this seems possible in the deeply statistics heavy context in which I often encounter this, all large numbers being reduced to decimal representation in trend lines.