Is the Number of Workers per Social Security Retiree Declining?

In the so-called "undercard" debate, Senator Lindsey Graham (R-SC) stated: “In 1950, there were 16 workers for every retiree. How many are there today? There’s three. In 20 years, there’s going to be two, and you’re going to have 80 million baby boomers like me retiring in mass wanting a Social Security check, and their Medicare bills paid.”

Sen. Graham was correct in using this data from the Social Security Trustees. Our friends from Fix the Debt often use this graph to illustrate that fact:

Ruling: True