Over 40% of Australians aged 15 to 74 years do not have the reading ability to live in a Modern society. Like to be able to read directions on how to take medication and how to use modern technology. In the above 65 years old it is over 70%.

Source: Australian Bureau of Statistics: http://www.abs.gov.au/ausstats/abs@.nsf/Lookup/4228.0Main+Features202011-12

https://www.oecd.org/skills/piaac/Skills%20volume%201%20(eng)–full%20v12–eBook%20(04%2011%202013).pdf