POLL: Trees by % Table Area?

I have enough trees to "wood" about 20% of a 3x5 table, as a rough estimate. However "wooding" a table top is somewhat dependent on what one considers proper spacing for trees, and whether the "wood" is an area representation (and thus abstract)— that is, each tree represents a much larger number of actual trees, or 1:1 where each individual tree is a distinct obstacle.