I initially wrote over 70%. I think I went too high.
"Number of reasons given. Of the 1,160 women who gave at least one reason, 89% gave at least two and 72% gave at least three; the median number of reasons given was four, and some women gave as many as eight reasons out of a possible 13 (not shown). Among women who gave at least two reasons, the most common pairs of reasons were inability to afford a baby and interference with school or work; inability to afford a baby and fear of single motherhood or relationship problems; and inability to afford a baby and having completed childbearing or having other people dependent on them."