There is a growing number of seniors driving for Uber and Lyft, to supplement their retirement income. In fact, twenty-three percent of people who drive an Uber are 50 or older and two-thirds of drivers have never made money driving before Uber, according to a 2015 company survey.

According to a recent article published at MSNBC “Uber is actively recruiting older drivers. The company partnered with AARP’s Life Reimagined subsidiary to enlist drivers over 50 with a $35 sign-up bonus if they drive 10 times or more. The program has brought in nearly 600 drivers.”

For George Cameron, a 65-year-old former marine in Mechanicsville, Virginia, retirement was not all it cracked up to be. “Although I’ve got a few community things I’m involved in,” Cameron says, “I sit at home and listen to the news.” Last year, Cameron re-entered the workforce after four years of retirement driving for Uber. Cameron gets in the car in the mid-afternoon and works until late around the Richmond area. He is spending 50 hours a week behind the wheel.

So how much are drivers making? 

Pay can vary widely depending on the hours worked and location. Uber conducted a study last year that found the average driver made $17 per hour, but it used rates from 2014 that were typically higher than what Uber pays now.

SherpaShare studied fare-per-trip trends based on millions of Uber and Lyft trips tracked by drivers on the SherpaShare app between January and May 2015.

The average Uber trip earned the driver $13.36 before expenses and the average Lyft trip paid the driver $12.53 before expenses in May 2015, according to SherpaShare’s self-reported data.