How can I find out what percentage of wages (for a family of 4) was spent on Health Insurance in 1970?

I am searching for something really cheap. Not GeicoI'm interested to determine what this' common  insurance  price could be. Iam 18 without incidents and Iam on my parents  insurance   policy. I understand what is the regular premiums although plenty of items may establish that? And is listed being a sports car or perhaps a normal family-car?
"The Community Leader (Todd E) has ensured that preexisting condition can not be base for rejection when buying medical health insurance. Until you get ill to buy  insurance   so why not only wait