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.
Lifetime risk refers to the probability that an individual, over the course of a lifetime, will develop cancer or die from it. In the US, men have a 1 in 2 lifetime risk of developing cancer, and for women the risk is 1 in 3.