When they talk about "Tesla tweaks the software running its vehicles by analyzing data from the hundreds of millions of miles driven by current owners."... Doe

When they talk about "Tesla tweaks the software running its vehicles by analyzing data from the hundreds of millions of miles driven by current owners."... Does that mean that they analyze the miles driven using autopilot or the miles driven by the human driver or both? It would seem that using data from human driven miles would give them good insight into how human drivers would react in weird and non-standard situations. Also, with as many cars as Tesla has out on the road, I wonder if the amount of data they have to feed into their self-driving systems is more than Google or other players in the space.