> Orthostatic hypotension is defined as a decrease in systolic blood pressure of 20 mm Hg or a decrease in diastolic blood pressure of 10 mm Hg within three minutes of standing when compared with blood pressure from the sitting or supine position.
Most people, then, have less of a decrease in blood pressure than that between supine and standing.
Perhaps more relevant would be the diagnostic criteria for orthostatic hypotension, a condition that most people don't have: https://www.aafp.org/afp/2011/0901/p527.html
> Orthostatic hypotension is defined as a decrease in systolic blood pressure of 20 mm Hg or a decrease in diastolic blood pressure of 10 mm Hg within three minutes of standing when compared with blood pressure from the sitting or supine position.
Most people, then, have less of a decrease in blood pressure than that between supine and standing.