EBRI (the Employer Benefit Research Institute) puts out data briefs ad summaries, but they often contain links to government databases that you can break down yourself.
For instance, here from the EBRI Databook provides an on overview/introducti on to employee benefits (including but not limited to health care). For those of you who are not comfortable with the data, it’s all summarized in this 10 page introductory chapter,w ith links that take you to other briefs. For those of you who want to dive more deeply into some of the federal data bases, there are links and date is a available in both PDF and Excel tables. For instance here are the “age pyramids” showing how the population is aging, and the relative sizes of older and younger cohorts. It’s also broken down by region, so, for instance you can look at the sunbelt versus the rust belt.
The chapter also provides links to lots of tables on employment trends – including women of childbearing age, veterans and the disabled.