Those real numbers sound about right (and my answers matched fairly closely to the real ones), except the figure about gay people. It depends if you include bisexual (swings both ways) as "gay", in which case that 3% figure would be more like 4% or even 5%. A fair number of people "experiment" or are "mostly straight but occasionally switch sides".
But the real value, regardless of how you compute it, is nowhere near 30%. Except on TV and Hollywood, of course.