Almost 40% 20-year-olds attend university or other tertiary institutions in Australia

https://www.education.gov.au/selected-higher-education-statistics-time-series-data
http://www.oecd.org/edu/Education-at-a-Glance-2014.pdf
http://theconversation.com/who-goes-to-university-the-changing-profile-of-our-students-40373
http://www.abs.gov.au/AUSSTATS/abs@.nsf/Lookup/6227.0Main+Features1May%202016?OpenDocument
The percentage of Australia’s population with a Bachelor’s degree is high by international standards. 

In recent years the number of students has increased as a share of the population, with 2006 census data showing 32.6% of 20-year-olds attending university or other tertiary institutions, in the 2011 census this increased to 36.6%. Once 2016 census data is released I estimate with current growth trend this will rise again to around 40%.

In 2011 the percentage of the population aged 15 and above with a Bachelor’s degree or higher (18.8%) was over nine times the figure for 1971 (2%).