During your annual physical, a nurse takes your blood pressure by wrapping a sphygmomanometer cuff around your upper arm, which modulates
the flow of blood through your brachial artery. The nurse then enters a reading of 115/70 in your medical chart. These numbers mean that the

The blood pressure in your arteries is normal.

Explanation:

Readings above 90/60 and below 120/80 indicate that the blood pressure is Normal. You don’t have to do anything if you’re not on blood pressure medicine and have no other symptoms. You just keep on doing you!

your answer is "the 1950's"