Someone can be more specific and accurate with this, but in the US, population percentages don't vote. Or in other words, some votes are worth more than others. So relying entirely on % of population isn't a great measure.
That's a fair point. By the numbers, about 60% of voters turned out in the last election. Historically, though, we've had lower turnouts. Let's say that nationally only 50% turned out but all farmers voted. That would make their 1+% block closer to 2-3% of the votes for an election which is more significant.
