Population by Year. World population from 5000 BC to 2016, with annual growth rate, yearly change, population density, and urban population. All people on 1 page. View the entire current world population on a single page, showing every single person one by one, increasing in real time.
To calculate your cholesterol ratio, divide your high-density lipoprotein (HDL, or good) cholesterol number into your total cholesterol number. An optimal ratio is less than 3.5-to-1. A higher ratio means a higher risk of heart disease.
The top number refers to the amount of pressure in your arteries during contraction of your heart muscle. This is called systolic pressure. The bottom number refers to your blood pressure when your heart muscle is between beats. This is called diastolic pressure. Both numbers are important in determining the state of your heart health.