that number seems high to me when i look at my social and acquaintance circles, but as an unpartnered person in the age range i can certainly understand it...
the way i personally see it, having essentially made my money and now working only for cashflow and to occupy some time the risks of partnering up are 2 great should a divorce happen.
add to that my political views and lack of interest in raising someone elses kids the dating pool is almost entirely empty unless really pushing the 'age acceptable' limits (not looking for a trophy) and what is left is not attractive to me at all.
what i do wonder about for me, and those like me if the #'s are as high as this study says, is what is going to happen in old age w/ the lack of spouse, children, etc. to assist?