That information was not available in the article, unfortunately. There may be more information on the Ministry's site, but that would be in Spanish.
I do know that the program started by prioritizing those 55 and over, the immunocompromised and people with other health conditions that put them at risk. So, they probably make up a significant percentage of this data. People that got Sinovac (Chinese vaccine) were the first eligible, but the program was soon expanded to those who got other vaccines, based on the date of their second shot.