Not figures but anacdote in EY. I had been seeking a second bat zivug (since stopped) by means of two Jewish dating sites. Filtering for radius, education, 50-60 age range and religious level, there seemed to be thousands of divorcees, many childless, and a fair amount of never marrieds. This is necessarily smaller by many measures than the real #s. Rabbanut logs their caseload, and it might be a source if an actuary type felt the need.