sentences:  The median age of the Mount Gravatt East population was 34 years of age, 3 years below the Australian median.71.8% of people living in Mount Gravatt East were born in Australia, compared to the national average of 69.8%; the next most common countries of birth were New Zealand 3.5%, England 2.8%, India 2.2%, South Africa 1%, China 0.9%.79.8% of people spoke English as their first language, with 1.6% Greek, 1.4% Mandarin, 1.1% Arabic, 1% Punjabi and 0.9% Cantonese.