Robocalls, or scripted calls made by an automated service, are considered by many to be a great annoyance. Some estimates place the number of robocalls at around 147 million per day, every day. So the chances of any single individual getting one of those calls once in a while, or more frequently, is very good indeed.
However, if you don't want to receive those calls -- and given the infrastructure currently in place -- the chances of you stopping them are almost zero.
The Verge delves more deeply into the matter in a piece titled "Why robocalls have taken over your phone." The article explains that the technology is accessible to just about anyone. There are no technical or financial hurdles to setting up a robocall system.
"The cost of doing business with that tech is also extraordinarily low: a caller might only pay a fraction of a penny per minute, and that's only for calls that are actually answered. There's no immediate financial hurdle preventing a company from running a system, and if even a tiny percentage of people called respond positively to the caller's message, it was likely worth it."