It can change each ordering cycle--Spring and Fall. In the Fall, we had 5 to choose from. Chevy Malibu, Ford Fusion, Nissan Altima, Hyundai Sonata, and VW Passat.
Not sure why you're worried, new hires have no choice of what vehicle you receive. You typically get a used vehicle from the fleet.
Here's where the remaining 20% would be. maternity leave 3% vacation 3% personal day 3% sick leave 5% death in the family 1% weather 2% personal emergency 2% cramps 1%