This was an article from December of 2014. It shows the EA/ED rates for some select schools for the high school class of 2015/college class of 2019. In the parentheses, it shows what the overall admit rate was from the previous year (high school class of 2014/college class of 2018).
Stanford and MIT show the same rate of admission for REA/EA (MIT is not restricted) of 10%. The aggregated admission rate for MIT from the previous year was 8%, and for Stanford 5%. These numbers are rounded.
This past year, Stanford had the lowest overall admission rate in the country. I believe that has been the case for the last three years running.