Please note that I'm not asking about getting a certificate good enough for flying a wide-body passenger jet (see related question). Rather, I'm asking about getting from zero flying experience to an actual pilot/co-pilot job at a major US airline (AA/Delta/UA/Southwest).
Perhaps some regulatory organization maintains such a statistics? Or even the airlines themselves?
I'm well aware that people can have various career paths (from ex-military pilots to guys who paid for 10000 flights hours out of their pockets), but with 40,000+ pilots employed by major airlines there must be a statistically-significant median experience.